Special battery pack for train tail

Abstract

The utility model relates to a special battery pack for a train tail, which comprises a box shell and a cover body capable of limiting and packaging a plurality of batteries, the box shell comprises an outer shell, an inner shell and an elastic support component, the inner shell is arranged in a shell cavity of the outer shell, and the elastic support component is arranged in the inner shell. The elastic supporting assembly is arranged between the inner shell and the outer shell to elastically support the inner shell in the outer shell; a heat absorption unit capable of absorbing and transferring heat in a shell cavity of the inner shell is embedded in the inner side wall and the inner bottom face of the inner shell, and a heat transfer pipeline capable of covering the heat release face of the heat absorption unit and transferring the heat absorbed by the heat absorption unit to the outside of the box shell is further arranged in the inner shell in a penetrating mode. The cover body is used for limiting the working position of the battery in the inner shell through an adjustable pressing assembly capable of adjusting the elastic strength and the pressing distance. According to the utility model, the impact of external vibration on the battery pack can be buffered while the discharge heat of the battery pack can be effectively transferred.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs at the rear of a train, in particular to a battery pack dedicated to the rear of a train. Background Art

[0002] With the development of the transportation industry, my country has continuously carried out research and development and improvement of trains, making the market of high-speed trains produced in my country spread all over the world. In the process of train renewal and intelligentization, and the improvement of electrical control functions, higher requirements are also put forward for the quality and life of the battery pack at the end of the train as the working energy source. At present, when the conventional battery pack at the end of the train is encapsulated, the battery module is simply encapsulated in the battery shell. It often uses the conventional buckling method to buckle the upper cover and lower shell of the battery shell. There is a relatively obvious installation gap, which leads to the battery module and the battery shell being not installed firmly enough. It is easy to cause the battery module to shake in the battery shell during the train formation process, which will affect the service life of the battery module. In order to improve the stability, the existing technology usually prevents the shaking of the battery module by filling the dressing. However, soft auxiliary materials such as foam and sponge will be damaged after multiple disassembly and charging, which is not conducive to long-term use; hard auxiliary materials cannot effectively buffer external shocks and vibrations, which can easily cause the battery module to continue to vibrate passively during the operation of the train and damage its internal components, thereby reducing its service life.

[0003] The existing tail battery packs are used in a harsh environment, often in a humid and dusty work environment. In order to improve their lifespan and waterproof and dustproof performance, a closed cavity space is usually constructed in the shell to install the battery module. However, the heat generated by the battery pack during the discharge process in the closed chamber will accumulate excessively inside the battery pack, causing the battery pack's operating temperature to gradually increase, which seriously reduces the durability and charge and discharge life of the battery pack. In addition, the existing tail battery pack does not have a buffer structure and cannot buffer the continuous vibration during the operation of the train, resulting in a decrease in the structural stability of the battery pack under continuous vibration impact and loosening of the limit structure, thereby shortening the actual service life of the battery pack. Utility Model Content

[0004] The utility model aims to provide a special battery pack for the tail of a train, which can effectively transfer the discharge heat of the battery pack and buffer the impact of external vibration on the battery pack, so as to solve the problems that the closed chamber of the existing tail battery pack, which is provided to ensure the dust and water resistance of its structure, has the disadvantages of heat accumulation during discharge operation, and the continuous impact of external vibration during use causes the structural stability to decrease and the connection structure to loosen, causing the battery to shake, thereby shortening the actual service life of the battery pack.

[0005] The technical solution adopted by the utility model is: a special battery pack for the tail of a train, comprising a box shell and a cover body capable of limited packaging of multiple batteries, the box shell comprising an outer shell, an inner shell and an elastic support component, the inner shell is placed in the shell cavity of the outer shell, and the elastic support component is arranged between the inner shell and the outer shell to elastically support the inner shell in the outer shell; a heat absorption unit capable of absorbing and transferring heat from the inside of the shell cavity is embedded on the inner side wall and the inner bottom surface of the inner shell, and a heat transfer pipeline capable of covering the heat release surface of the heat absorption unit and transferring the heat absorbed by the heat absorption unit to the outside of the box shell is also penetrated in the inner shell, and the cover body limits the working position of the battery in the inner shell by an adjustable pressing component with adjustable elastic strength and pressing distance.

[0006] According to a preferred embodiment, the elastic support assembly includes a first plate body, a second plate body, a first limit spring, a second support spring and a positioning insert, wherein the first plate body and the second plate body are parallel to each other and a plurality of the first limit springs are arranged in an array between the two, the second support springs are arranged in an array on the inner bottom surface of the outer shell body, and the axial upper end of the second support spring is connected to the positioning insert which is matched with the positioning grooves arranged in the bottom surface array of the inner shell body for docking.

[0007] According to a preferred embodiment, a first plugging groove and a second plugging groove are respectively arranged in a corresponding manner on the inner side wall of the outer shell and the outer side wall of the inner shell, so that the first plate body and the second plate body of the elastic support assembly are respectively inserted into the first plugging groove and the second plugging groove to provide a lateral elastic supporting force in a manner of buffering external impacts, thereby limiting the lateral spacing between the outer shell and the inner shell.

[0008] According to a preferred embodiment, the axial upper section of the outer shell is also provided with a limit clamping assembly which can adjustably limit the installation position of the cover body, and the shell wall of the outer shell is provided with vertical grooves and transverse grooves for accommodating the limit clamping assembly, and the vertical grooves and the transverse grooves are circumferentially spaced and arranged at the upper ends of multiple side surfaces of the outer shell in a mutually connected manner.

[0009] According to a preferred embodiment, a mounting guide groove is opened on the lower surface of the cover body, and an adjustable pressure assembly capable of limiting the position of the battery in the inner shell is arranged in the mounting guide groove, and the adjustable pressure assembly comprises a driving screw, a translation block, a pressure arc sheet and a pressure mesh plate, wherein a plurality of groups of bidirectional threads with opposite spiral directions are arranged at intervals on the driving screw, and a plurality of the translation blocks are arranged at intervals on different threaded rod sections of the driving screw, and two of the translation blocks arranged on two threaded rod sections of the same group are connected to the two ends of the pressure arc sheet; the middle section of the pressure arc sheet away from the translation block is connected with the pressure mesh plate capable of resting on the upper end surface of the battery.

[0010] According to a preferred embodiment, the heat absorption unit includes a first heat absorption unit arranged on two side wall surfaces of the inner shell and a second heat absorption unit embedded in the inner bottom surface of the inner shell.

[0011] According to a preferred embodiment, the heat transfer pipeline includes a spiral coil, a flat coil, a plug-in tube and a circulating external tube. The spiral coil is arranged in the side shell wall of the inner shell in a manner of surrounding the heat release surface of the first heat absorption unit; the flat coil is attached to the heat release surface of the second heat absorption unit; and the ports of the spiral coil and the flat coil are connected to the circulating external tube through the plug-in tube.

[0012] According to a preferred embodiment, the limiting clamping assembly includes a first trapezoidal block, a first connecting rod, a second trapezoidal block and a second connecting rod, wherein the first connecting rod is mounted on the bottom surface of the cover body, and its axial lower end is connected to the first trapezoidal block, so that when the cover body is docked with the box shell, the first connecting rod and the first trapezoidal block are inserted into the vertical groove, and the second connecting rod is horizontally inserted in the horizontal groove, and its insertion front end is connected to the second trapezoidal block which is at least partially inserted into the vertical groove.

[0013] According to a preferred embodiment, the second connecting rod is inserted into the rod body in the transverse groove and connected to a limiting step, and the second connecting rod is also sleeved with a limiting spring and a limiting sleeve, and the limiting sleeve is detachably installed at the open end of the transverse groove.

[0014] According to a preferred embodiment, a sealing ring is further provided on the lower surface of the cover body.

[0015] The beneficial effects of the utility model are:

[0016] The multi-layer shell of the box shell provided in the present application is provided with an elastic support structure, so as to effectively buffer and attenuate the transmission of external vibration and impact force, so as to improve the stability of the battery, avoid the limit shaking of the battery caused by continuous impact and vibration, and ensure the stability of the structure. The cover body provided in the present application is assembled with the box shell in an adjustable limit mode, so that the pressing position and pressing strength can be adjusted according to the actual size of the battery, which improves the stability and application range of the limit, and the adjustable limit of the elastic pressing structure can also buffer the vibration, attenuate the impact force and vibration transmitted by it, so as to protect the integrity of the battery. The heat absorption unit and heat transfer pipeline provided in the present application can effectively transfer the heat in the closed chamber by active heat transfer, realize effective heat dissipation and cooling while ensuring the airtightness of the chamber, so as to obtain excellent moisture-proof and dust-proof effects while ensuring the working temperature of the battery, so as to eliminate the damage to the battery caused by external moisture vapor and dust, effectively improve the life of the battery, and the excellent active heat dissipation structure can effectively dissipate the heat in the closed chamber to reduce the working temperature of the battery, prevent the battery from abnormal operating conditions under high temperature conditions, and effectively improve the durability and charge and discharge life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a preferred battery pack dedicated to the rear of a train proposed by the utility model;

[0018] Figure 2 It is a schematic plan view of a box shell of a preferred battery pack for the tail of a train proposed by the utility model;

[0019] Figure 3 This is a schematic structural diagram of part A of a preferred battery pack dedicated to the rear of a train proposed by the utility model;

[0020] Figure 4 This is a schematic structural diagram of an elastic support assembly of a preferred battery pack dedicated to the rear of a train proposed by the utility model;

[0021] Figure 5 It is a structural schematic diagram of the B part of a preferred battery pack specially used at the end of a train proposed by the utility model.

[0022] Reference numerals list

[0023] 1: box shell; 2: cover; 3: heat absorption unit; 4: heat transfer pipeline; 5: heat release unit; 6: battery; 11: outer shell; 12: inner shell; 13: elastic support assembly; 14: limit clamp assembly; 21: installation guide groove; 22: adjustable pressure assembly; 23: sealing ring; 31: first heat absorption unit; 32: second heat absorption unit; 41: spiral coil; 42: flat coil; 43: plug-in pipe; 44: circulation external pipe; 111: first plug-in slot; 112: vertical slot; 113: horizontal slot Slot; 121: second plug-in slot; 122: positioning slot; 131: first plate body; 132: second plate body; 133: first limiting spring; 134: second supporting spring; 135: positioning insert; 141: first trapezoidal block; 142: first connecting rod; 143: second trapezoidal block; 144: second connecting rod; 145: limiting step; 146: limiting spring; 147: limiting sleeve; 221: driving screw; 222: translation block; 223: pressing arc piece; 224: pressing mesh plate. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be briefly introduced below in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] The technical solution provided by the present invention will be described in detail below by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is used to help understand the present invention, but does not constitute a limitation of the present invention. In some examples, some implementation methods are not described or are not described in detail because they belong to existing or conventional technologies.

[0026] In addition, the technical features recorded in this article, or the steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the steps or operation sequence of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only for illustrative purposes and does not imply a requirement to follow a certain order unless it is explicitly stated that a certain order is required.

[0027] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, under reasonable circumstances (not constituting a self-contradiction), include direct and indirect connections (couplings).

[0028] The following is a detailed description with reference to the accompanying drawings.

[0029] Example 1

[0030] The present application provides a battery pack dedicated to the rear of a train, which includes a box shell 1, a cover body 2, a heat absorption unit 3, a heat transfer pipeline 4, a heat release unit 5 and a battery 6.

[0031] according to Figure 1-5 In a specific embodiment shown, the box shell 1 and the cover body 2 cooperate with each other to define a storage space for limiting the installation of multiple batteries 6 connected in series and / or in parallel. A heat absorbing unit 3 is embedded in the box shell 1, which can actively absorb and transfer the heat generated and dissipated to the outside when the battery 6 is discharged. A heat transfer pipeline 4 is also penetrated in the box shell 1, which is attached to the heat release surface of the heat absorbing unit 3 and continuously transfers heat to the outside. The input end and the output end of the heat transfer pipeline 4 are respectively connected to the output end and the input end of the external heat release unit 5, so that the heat release unit 5 is used to transfer the heat carried by the heat transfer fluid flowing in the heat transfer pipeline 4 for a second time, so as to reduce the temperature of the heat transfer fluid, so that the heat transfer fluid can circulate to the heat release surface of the heat absorbing unit 3 for a second time and absorb and transfer the heat. The heat unit 5 and the heat transfer pipeline 4 can form a closed loop and continuously transfer the heat in the closed inner cavity to the external environment. The multi-layer shell of the box shell 1 provided in the present application is provided with an elastic support structure, so as to effectively buffer and attenuate the transmission of external vibration and impact force, so as to improve the stability of the battery 6, avoid the limit shaking of the battery 6 caused by continuous impact and vibration, and ensure the stability of the structure. The cover body 2 provided in the present application is assembled with the box shell 1 in an adjustable limit mode, so that the pressing position and pressing strength can be adjusted according to the actual size of the battery 6, which improves the stability and application range of the limit, and the adjustable limit of the elastic pressing structure can also buffer the vibration, attenuate the impact force and vibration transmitted by it, so as to protect the integrity of the battery 6. The heat absorption unit 3 and heat transfer pipeline 4 provided in the present application can effectively transfer the heat in the closed chamber by active heat transfer, realize effective heat dissipation and cooling while ensuring the airtightness of the chamber, so as to obtain excellent moisture-proof and dust-proof effects while ensuring the working temperature of the battery 6, so as to eliminate the damage of external moisture vapor and dust to the battery, effectively improve the life of the battery, and the excellent active heat dissipation structure can effectively dissipate the heat in the closed chamber to reduce the working temperature of the battery, prevent the battery from abnormal working conditions under high temperature conditions, and effectively improve the durability and charge and discharge life of the battery.

[0032] Preferably, the box shell 1 includes an outer shell 11, an inner shell 12, an elastic support component 13 and a limit clamping component 14. Preferably, the inner shell 12 is placed in the shell cavity of the outer shell 11. Further preferably, an elastic support component 13 is provided between the inner shell 12 and the outer shell 11 to elastically support the inner shell 12 in the outer shell 11. Preferably, a heat absorbing unit 3 capable of absorbing and transferring heat inside its shell cavity is embedded on the inner side wall and the inner bottom surface of the inner shell 12. Preferably, a heat transfer pipeline 4 capable of covering the heat release surface of the heat absorbing unit 3 and transferring the heat absorbed by the heat absorbing unit 3 to the outside of the box shell 1 is also penetrated in the inner shell 12. Preferably, a limit clamping component 14 that adjustably limits the installation position of the cover body 2 is also provided in the axial upper section of the outer shell 11. The elastic support component 13 provided in the present application can provide elastic support force, so that the vibration and impact force exerted on the outer shell 11 can be effectively buffered by the elastic support component 13, and there is a high connection stability between the inner shell 12 and the battery 6, thereby avoiding the problem of assembly gap caused by continuous impact, which causes the battery 6 to shake, and makes the overall structure have high stability during continuous use, thereby greatly extending the life of the battery 6.

[0033] Preferably, a vertical groove 112 and a horizontal groove 113 for accommodating the position-limiting clamping assembly 14 are provided on the shell wall of the outer shell 11. Preferably, the vertical groove 112 and the horizontal groove 113 are arranged circumferentially and spaced apart at the upper ends of multiple side surfaces of the outer shell 11 in a mutually connected manner. Specifically, the outer shell 11 is provided with a vertical groove 112 for accommodating the first connecting rod 142 and a horizontal groove 113 for accommodating the second connecting rod 144. Specifically, the horizontal groove 113 penetrates a part of the shell wall of the outer shell 11 and is connected with the vertical groove 112.

[0034] Preferably, a first plugging groove 111 and a second plugging groove 121 are respectively arranged on the inner wall of the outer shell 11 and the outer wall of the inner shell 12, so that the first plate body 131 and the second plate body 132 of the elastic support assembly 13 are respectively inserted into the first plugging groove 111 and the second plugging groove 121, thereby providing lateral elastic supporting force by buffering external impacts, thereby limiting the lateral spacing between the outer shell 11 and the inner shell 12.

[0035] Preferably, the elastic support assembly 13 includes a first plate 131, a second plate 132, a first limit spring 133, a second support spring 134 and a positioning insert 135. Preferably, the first plate 131 and the second plate 132 are parallel to each other and a plurality of first limit springs 133 are arranged in an array between the first plate 131 and the second plate 132. Preferably, the second support springs 134 are arranged in an array on the inner bottom surface of the outer shell 11. Preferably, the axial upper end of the second support spring 134 is connected with a positioning insert 135 that is matched with the positioning groove 122 arranged in an array on the bottom surface of the inner shell 12. Further preferably, the second support spring 134 can elastically support the height of the inner shell 12 in the outer shell 11, and can also buffer external vibrations, thereby reducing the strength of external vibrations and shocks transmitted to the inner shell 12. Preferably, plug-in strips that can match the first plug-in slot 111 and the second plug-in slot 121 are also provided on both sides of the first plate 131 and the second plate 132.

[0036] Preferably, the position-limiting clamping assembly 14 comprises a first trapezoidal block 141, a first connecting rod 142, a second trapezoidal block 143, a second connecting rod 144, a position-limiting step 145, a position-limiting spring 146 and a position-limiting sleeve 147. Preferably, the first connecting rod 142 is mounted on the bottom surface of the cover body 2. Preferably, the first trapezoidal block 141 is connected to its axial lower end, so that when the cover body 2 is docked with the box shell 1, the first connecting rod 142 and the first trapezoidal block 141 are inserted into the vertical groove 112. Preferably, the second connecting rod 144 is horizontally inserted in the horizontal groove 113, and the second trapezoidal block 143 at least partially inserted into the vertical groove 112 is connected to its insertion front end, so that the second trapezoidal block 143 can adjustably limit the position of the first trapezoidal block 141 in the vertical groove 112 to limit the connection state between the box shell 1 and the cover body 2. Preferably, the second connecting rod 144 is connected to the rod body in the horizontal groove 113 and the position-limiting step 145 is connected. Further preferably, the second connecting rod 144 is also sleeved with a limiting spring 146 and a limiting sleeve 147. Specifically, the limiting sleeve 147 is detachably mounted on the open end of the transverse groove 113 to limit the position of the second connecting rod 144 in cooperation with the limiting step 145 and the limiting spring 146. When in use, the second connecting rod 144 limits the working state of the second trapezoidal block 143 in the vertical groove 112 at the initial position, so that when the first trapezoidal block 141 and the first connecting rod 142 are inserted into the vertical groove 112, the connection state of the box shell 1 and the cover body 2 is limited by limiting the position of the first trapezoidal block 141. When the cover body 2 needs to be disassembled, the external force pulls the second connecting rod 144 to move to the outside of the transverse groove 113, so that the second trapezoidal block 143 at least partially enters the transverse groove 113 to release the limit of the first trapezoidal block 141, and then releases the limit connection between the box shell 1 and the cover body 2.

[0037] Preferably, the cover body 2 limits the working position of the battery 6 in the inner shell 12 by means of an adjustable pressing assembly 22 with adjustable elastic strength and pressing distance. Preferably, a mounting guide groove 21 is provided on the lower surface of the cover body 2. Preferably, an adjustable pressing assembly 22 capable of limiting the position of the battery 6 in the inner shell 12 is provided in the mounting guide groove 21. Preferably, the adjustable pressing assembly 22 limits the working position of the battery 6 in the inner shell 12 by means of adjusting the elastic strength and pressing distance. Further preferably, a sealing ring 23 is also provided on the lower surface of the cover body 2 to fill the packaging gap between the cover body 2 and the box shell 1 to form a sealed inner chamber.

[0038] Preferably, the adjustable pressure component 22 includes a driving screw 221, a translation block 222, a pressure arc piece 223 and a pressure mesh plate 224. Preferably, multiple groups of bidirectional threads with opposite spiral directions are arranged at intervals on the driving screw 221, and multiple translation blocks 222 are arranged at intervals on different threaded rod sections of the driving screw 221. Preferably, two translation blocks 222 arranged on two threaded rod sections of the same group are connected to the two ends of the pressure arc piece 223, so that the two translation blocks 222 change the curvature of the pressure arc piece 223 in a way that they move toward or away from each other when the driving screw 221 rotates, so as to adjust the pressure width and pressure strength. Preferably, a pressure mesh plate 224 that can be pressed against the upper end surface of the battery 6 is connected to the middle section of the pressure arc piece 223 away from the translation block 222. Specifically, the bidirectional threads of the same group refer to the threads on two adjacent rods having opposite directions, so that when the driving screw 221 rotates under the action of external force, the translation blocks 222 on the above two rods can move toward or away from each other under the guide limit of the installation guide groove 21, thereby changing the distance between the two ends of the pressing arc piece 223, so that the pressing arc piece 223 can form different curvatures, so that the pressing mesh plate 224 connected thereto can be elastically and highly strongly pressed against the upper surface of the battery 6. The adjustable pressing assembly 22 provided in the present application can adjust its pressing distance according to the size of the battery 6, so as to adapt to the limited installation requirements of batteries 6 of various sizes while ensuring the strength of the pressing force. The pressing arc piece 223 provided in the present application can buffer vibration in a deformable manner to reduce the strength of the vibration transmission to the battery 6, and the elastic support structure constructed by it can effectively eliminate the installation gap and ensure the stability of the limit. The present application adjusts the bending state of the pressing arc piece 223 by setting a driving screw rod 221 and a translation block 222 to achieve elastically adjustable support and limiting.

[0039] Preferably, the heat absorbing unit 3 includes a first heat absorbing unit 31 arranged on two side wall surfaces of the inner shell 12 and a second heat absorbing unit 32 embedded in the inner bottom surface of the inner shell 12 .

[0040] Preferably, the heat transfer pipeline 4 includes a spiral coil 41, a flat coil 42, a plug-in tube 43 and a circulating external tube 44. Preferably, the spiral coil 41 is arranged in the side shell wall of the inner shell 12 in a manner of surrounding the heat release surface of the first heat absorption unit 31. Preferably, the flat coil 42 is attached to the heat release surface of the second heat absorption unit 32. Further preferably, the input ends of the parallel spiral coil 41 and the flat coil 42 are connected to the same circulating external tube 44 through the plug-in tube 43 that penetrates the box shell 1. Specifically, the input end of the circulating external tube 44 is connected to the output end of the heat release unit 5. Preferably, the output ends of the mutually parallel spiral coil 41 and the flat coil 42 also penetrate the plug-in tube 43 of the box shell 1 and are connected to the same circulating external tube 44, thereby connecting to the input end of the heat release unit 5, and then the heat transfer pipeline 4 and the heat release unit 5 form a circulating heat dissipation reflux. Preferably, the flat coil 42 is a tube body surface formed by orderly arranging S-shaped tube bodies and connecting end to end.

[0041] Preferably, the heat dissipation unit 5 can be a heat dissipation pipe arranged on the surface of the train, which can take away the heat dissipated from the surface of the heat dissipation pipe through the airflow formed by the direct relative movement of the train and the air when the train moves at high speed. Further preferably, the surface of the heat dissipation pipe is also provided with heat dissipation fins for expanding the surface.

[0042] The present utility model is not limited to the above optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope of the claims of the present utility model fall within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute limitations on the claims. The protection scope of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A battery pack for the end of a train, comprising a box shell (1) and a cover (2) capable of limiting the packaging of a plurality of batteries (6), characterized in that: The box shell (1) comprises an outer shell (11), an inner shell (12) and an elastic support component (13); the inner shell (12) is placed in a shell cavity of the outer shell (11), and the elastic support component (13) is arranged between the inner shell (12) and the outer shell (11) to elastically support the inner shell (12) in the outer shell (11); A heat absorbing unit (3) capable of absorbing and transferring heat from the interior of the shell cavity is embedded on the inner side wall and the inner bottom surface of the inner shell (12), and a heat transfer pipeline (4) capable of covering the heat release surface of the heat absorbing unit (3) and transferring the heat absorbed by the heat absorbing unit (3) to the outside of the box shell (1) is also provided in the inner shell (12). The cover body (2) defines the working position of the battery (6) in the inner shell (12) by means of an adjustable pressing assembly (22) capable of adjusting the elastic strength and the pressing distance.

2. The battery pack for the tail end of a train as claimed in claim 1, characterized in that: The elastic support assembly (13) comprises a first plate (131), a second plate (132), a first limit spring (133), a second support spring (134) and a positioning insert (135), wherein: The first plate (131) and the second plate (132) are parallel to each other and a plurality of the first limit springs (133) are arranged in an array between the two. The second support springs (134) are arranged in an array on the inner bottom surface of the outer shell (11), and the axial upper ends of the second support springs (134) are connected to the positioning inserts (135) that are matched with the positioning grooves (122) arranged in an array on the bottom surface of the inner shell (12).

3. The battery pack for the tail end of a train as claimed in claim 2, characterized in that: The inner side wall of the outer shell (11) and the outer side wall of the inner shell (12) are respectively provided with a first plug-in slot (111) and a second plug-in slot (121) arranged in a corresponding manner, so that the first plate (131) and the second plate (131) of the elastic support assembly (13) can be connected to each other. The second plate body (132) is respectively inserted into the first insertion slot (111) and the second insertion slot (121) to provide a transverse elastic support force in a manner of buffering external impact, thereby limiting the side spacing between the outer shell (11) and the inner shell (12).

4. The battery pack for the tail end of a train as claimed in claim 3, characterized in that: The axial upper section of the outer shell (11) is also provided with a position limiting clamping assembly (14) which can adjustably limit the installation position of the cover body (2). Furthermore, a vertical groove (112) and a horizontal groove (113) for accommodating the position-limiting clamping assembly (14) are provided on the shell wall of the outer shell (11), and the vertical groove (112) and the horizontal groove (113) are arranged at intervals in a circumferential direction on the upper ends of multiple side surfaces of the outer shell (11) in a mutually connected manner.

5. The battery pack for the tail end of a train as claimed in claim 4, characterized in that: A mounting guide groove (21) is provided on the lower surface of the cover body (2), and an adjustable pressing component (22) capable of defining the position of the battery (6) in the inner shell (12) is provided in the mounting guide groove (21). The adjustable pressing assembly (22) comprises a driving screw (221), a translation block (222), a pressing arc piece (223) and a pressing mesh plate (224), wherein: The driving screw rod (221) is provided with a plurality of groups of bidirectional threads with opposite spiral directions at intervals, and a plurality of translation blocks (222) are provided at intervals on different threaded rod sections of the driving screw rod (221). Furthermore, two translation blocks (222) disposed on two threaded rod segments in the same group are connected to two ends of the pressing arc piece (223); The pressing mesh plate (224) capable of resting against the upper end surface of the battery (6) is connected to the middle section of the pressing arc plate (223) away from the translation block (222).

6. The battery pack for the tail end of a train as claimed in claim 5, characterized in that: The heat absorbing unit (3) comprises a first heat absorbing unit (31) arranged on two side wall surfaces of the inner shell (12) and a second heat absorbing unit (32) embedded on the inner bottom surface of the inner shell (12).

7. The battery pack for the tail end of a train as claimed in claim 6, characterized in that: The heat transfer pipeline (4) It includes a spiral coil (41), a flat coil (42), a plug-in pipe (43) and a circulating external pipe (44). The spiral coil (41) is arranged in the side shell wall of the inner shell (12) in a manner of surrounding the heat release surface of the first heat absorption unit (31); The flat coil (42) is attached to the heat release surface of the second heat absorption unit (32); The ports of the spiral coil (41) and the flat coil (42) are connected to the circulation external pipe (44) via the plug pipe (43).

8. The battery pack for the tail end of a train as claimed in claim 7, characterized in that: The position-limiting clamping assembly (14) comprises a first trapezoidal block (141), a first connecting rod (142), a second trapezoidal block (143) and a second connecting rod (144), wherein: The first connecting rod (142) is mounted on the bottom surface of the cover body (2), and the first trapezoidal block (141) is connected to the axial lower end thereof, so that when the cover body (2) and the box shell (1) are docked, the first connecting rod (142) and the first trapezoidal block (141) are inserted into the vertical groove (112). The second connecting rod (144) is inserted transversely into the transverse groove (113), and its insertion front end is connected to the second trapezoidal block (143) which is at least partially inserted into the vertical groove (112).

9. The battery pack for the tail end of a train as claimed in claim 8, characterized in that: The second connecting rod (144) is inserted into the transverse groove (113) and connected to a limiting step (145). The second connecting rod (144) is also sleeved with a limiting spring (146) and a limiting sleeve (147). The limiting sleeve (147) is detachably mounted on the open end of the transverse groove (113).

10. The battery pack for the tail end of a train as claimed in claim 9, characterized in that: A sealing ring (23) is also provided on the lower surface of the cover body (2).

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