High-density water-cooling heat dissipation type lithium battery pack for new energy automobile

Abstract

The invention relates to the technical field of new energy batteries, in particular to a high-density water-cooling heat dissipation type lithium battery pack for a new energy automobile, the high-density water-cooling heat dissipation type lithium battery pack comprises a battery driving seat and a battery module, and a supporting top plate and a supporting bottom plate are respectively provided with a water-cooling heat dissipation structure; the supporting bottom plate is provided with a negative electrode connecting piece for connecting negative electrodes of two adjacent lithium batteries, a top cover capable of elastically overturning is arranged in a top hole of the supporting top plate, the battery driving seat is provided with a dismounting mechanism for ejecting the lithium batteries from the battery module, the dismounting mechanism comprises a jacking seat moving in the X-axis direction, the Y-axis direction and the Z-axis direction, and the jacking seat is provided with an ejection needle; the supporting bottom plate is provided with a bottom hole for the ejector pin to pass through, and the negative electrode connecting piece is provided with a negative electrode ejector hole for the ejector pin to pass through; when the lithium battery needs to be disassembled and replaced, the ejector pin penetrates through a bottom hole of the supporting bottom plate and then penetrates through a negative electrode ejector hole of the negative electrode connecting piece, so that the lithium battery can be separated from the supporting bottom plate; and the integrity of the battery module can be ensured during disassembly and replacement.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a high-density water-cooled lithium battery pack for new energy vehicles. Background Art

[0002] Secondary batteries, which are easily applicable to various product groups and have electrical characteristics such as high energy density, are widely used not only in portable devices but also in electric vehicles (EV) or hybrid electric vehicles (HEV) driven by electric drive sources. Secondary batteries have attracted attention as an environmentally friendly and energy-efficient new energy source because their main advantage is that the use of fossil fuels can be significantly reduced, and their secondary advantage is that no byproducts are generated due to the use of energy.

[0003] The types of secondary batteries currently widely used in the art include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, etc. The unit secondary battery cell (i.e., unit battery cell) has an operating voltage of about 2.5V to 4.5V. Therefore, if a higher output voltage is required, a battery pack is formed by connecting a plurality of battery cells in series. In addition, a battery pack can be formed by connecting a plurality of battery cells in parallel according to the charge / discharge capacity required for the battery pack. Therefore, the number of battery cells included in the battery pack can be set in various ways according to the required output voltage or charge / discharge capacity.

[0004] The existing battery module is composed of multiple lithium batteries. The positive and negative electrodes of the lithium batteries are connected to the corresponding electrode conductive sheets, and the electrode conductive sheets of two adjacent lithium batteries are connected to each other. When an individual lithium battery becomes abnormal and needs to be disassembled and replaced, it is necessary to disassemble the electrode conductive sheet and then disassemble the lithium battery. This disassembly method is relatively cumbersome and will damage the structure of the battery module. Summary of the invention

[0005] The purpose of the present invention is to provide a high-density water-cooled lithium battery pack for new energy vehicles in view of the deficiencies in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A high-density water-cooled lithium battery pack for new energy vehicles, comprising a battery drive seat and a battery module arranged on the top of the battery seat, the battery module comprising a supporting bottom plate, a supporting middle plate and a supporting top plate, the supporting middle plate is provided with a battery hole, a lithium battery is installed in the battery hole, and the supporting top plate is provided with a top hole for inserting the lithium battery;

[0008] The support top plate and the support bottom plate are respectively provided with a water-cooling heat dissipation structure, the water-cooling heat dissipation structure includes a water-cooling channel formed on the support top plate, a water-cooling inlet is formed at one end of the water-cooling channel, and a water-cooling outlet is provided at the other end, the water-cooling inlet or the water-cooling outlet; a water-cooling water pump is installed at the water-cooling inlet;

[0009] The supporting bottom plate is provided with a negative electrode connecting piece for connecting the negative electrodes of two adjacent lithium batteries, the top hole of the supporting top plate is provided with an elastically flippable top cover, the top cover is equipped with a positive electrode connecting piece connected to the positive electrode of the lithium battery, and the positive electrode connecting pieces of the two adjacent top covers are electrically connected;

[0010] The battery drive seat is provided with a disassembly mechanism for ejecting the lithium battery from the battery module, the disassembly mechanism includes a drive cavity formed in the battery drive seat, an X-axis linear module is arranged in the drive cavity along the X-axis direction and a support guide rail is arranged along the Y-axis direction of the drive cavity, the X-axis linear module can move along the length direction of the support guide rail, a lifting drive seat is installed at the driving end of the X-axis linear module, the lifting drive seat is installed with a lifting seat that can move in the Z-axis direction, and the lifting seat is installed with an ejection pin;

[0011] The support bottom plate is provided with a bottom hole for the ejection pin to pass through, and the negative electrode connecting piece is provided with a negative electrode ejection hole for the ejection pin to pass through.

[0012] Furthermore: the battery module also includes a connecting structure connecting the supporting bottom plate, the supporting middle plate and the supporting top plate, the connecting structure includes guide connecting holes coaxially opened on the supporting bottom plate, the supporting middle plate and the supporting top plate, and guide connecting columns are passed through the guide connecting holes between the supporting bottom plate, the supporting middle plate and the supporting top plate; wherein the supporting bottom plate and the supporting top plate are respectively provided with locking connectors connected to the guide connecting columns.

[0013] Furthermore: the supporting top plate is provided with an elastic hinge for installing the top cover, one end of the elastic hinge is fixed to the periphery of the top hole of the supporting top plate, and the other end of the elastic hinge is connected to the top cover. The elastic hinge can elastically drive the top cover to flip close to the top hole, and the positive electrode connecting piece installed at the bottom of the top cover is formed with an elastic conductive block that elastically contacts the positive electrode of the lithium battery.

[0014] Furthermore: the support top plate is formed with a first conductive groove and a second conductive groove, wherein the first conductive groove is arranged along the direction of the support top plate, and the second conductive groove is arranged along the width direction of the support top plate; the first conductive groove and the second conductive groove are respectively arranged with conductive connecting wires, and the conductive connecting wires of the first conductive groove and the second conductive groove cooperate with each other to be conductively connected to the positive electrode connecting plate of the top cover in turn.

[0015] Further: the elastic hinge includes a rotating shaft, the rotating shaft has a first hinge plate and a second hinge plate, the first hinge plate is formed with a first movable sleeve nested in the rotating shaft, the second hinge plate is formed with a second movable sleeve nested in the rotating shaft, the rotating shaft is also nested with a torsion spring, one end of the torsion spring is connected to the first hinge plate, the other end of the torsion spring is connected to the second hinge plate, and the second hinge plate is fixedly mounted on the supporting top plate.

[0016] Further: the negative electrode connecting sheet includes a negative electrode sheet and a first negative terminal and a second negative terminal formed on the negative electrode sheet; the negative electrode sheet is formed with an insulating connecting block connected to the supporting base plate, the supporting base plate is formed with a movable connecting groove for inserting the insulating connecting block, the cross-sectional shape of the movable connecting groove is a cross shape, and a cross connecting block connected to the movable connecting groove is formed at the bottom of the insulating connecting block.

[0017] Furthermore: the first negative terminal and the second negative terminal are respectively formed with raised conductive connection points, and the negative electrode of the lithium battery is formed with a negative electrode conductive groove that is in conductive contact with the conductive connection point.

[0018] Further: the first negative terminal and the second negative terminal are respectively formed with the negative electrode ejection holes for the ejection pin to pass through.

[0019] Furthermore: there are two support rails, the two support rails are parallel to each other, and the support rails are formed with guide sliding grooves along the length direction. Guide sliding blocks that slide in cooperation with the guide sliding grooves are installed at both ends of the X-axis linear module.

[0020] Further: a bottom mounting groove is formed along the length direction at the bottom of the supporting guide rail, a bottom linear module is installed in the bottom mounting groove, a Y-axis driving seat is installed at the driving end of the bottom linear module, the top of the bottom mounting groove is connected to the guide sliding groove, and the Y-axis driving seat is connected to the guide sliding block.

[0021] The beneficial effects of the present invention are as follows: when the lithium battery needs to be disassembled and replaced, the disassembly mechanism of the battery drive seat works, and the ejector pin of the lifting seat can move in the X, Y, and Z axes. The ejector pin can be moved to be coaxially aligned with the lithium battery that needs to be disassembled, and then the ejector pin passes through the bottom hole of the supporting bottom plate, and then passes through the negative electrode ejection hole of the negative electrode connecting plate, so that the lithium battery can be separated from the supporting bottom plate; the top of the lithium battery will prop up the top cover, and the lithium battery passes through the top hole of the supporting top plate to complete the separation, and disassembly and replacement are realized without disassembling the positive and negative electrode sheets, and the integrity of the battery module can be guaranteed during disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a battery module.

[0023] Figure 2 A schematic diagram of the cross-sectional structure of a battery module.

[0024] Figure 3 It is a structural schematic diagram of the lithium battery connected to the supporting top plate and the supporting middle plate.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the lithium battery connected to the supporting top plate.

[0026] Figure 5 A schematic diagram of the disassembly mechanism.

[0027] Reference numerals include:

[0028] 1-Battery module,

[0029] 11-support bottom plate, 12-support middle plate, 13-support top plate, 14-battery hole, 15-lithium battery,

[0030] 16-guide connection hole, 17-guide connection column, 18-locking connector, 19-top hole,

[0031] 190- water cooling structure, 191- water cooling inlet, 192- water cooling outlet, 193- water cooling channel,

[0032] 194-Water cooling pump,

[0033] 2- Elastic hinges,

[0034] 20-top cover, 21-rotation axis, 22-first hinge plate, 23-second hinge plate, 24-torsion spring,

[0035] 25-positive electrode connecting piece, 26-first conductive slot, 27-second conductive slot, 28-conductive connecting wire,

[0036] 3-Battery drive seat,

[0037] 31-X axis linear module, 32-support guide rail, 33-lifting drive seat, 34-lifting seat,

[0038] 35- ejector pin, 36- guide slide slot, 37- bottom mounting slot, 38- bottom linear module,

[0039] 39-Y-axis drive seat,

[0040] 4-Negative electrode connecting piece,

[0041] 41-negative electrode sheet, 42-first negative terminal, 43-second negative terminal, 44-insulating connecting block,

[0042] 45 - movable connection groove, 46 - conductive connection point, 47 - negative electrode conductive groove, 48 - negative electrode ejection hole. DETAILED DESCRIPTION

[0043] The present invention is described in detail below with reference to the accompanying drawings.

[0044] like Figure 1-5 As shown, a high-density water-cooled lithium battery pack for new energy vehicles includes a battery drive seat 3 and a battery module 1 arranged on the top of the battery seat, the battery module 1 includes a supporting bottom plate 11, a supporting middle plate 12 and a supporting top plate 13, the supporting middle plate 12 is provided with a battery hole 14, the battery hole 14 is installed with a lithium battery 15, and the supporting top plate 13 is provided with a top hole 19 for inserting the lithium battery 15; the lithium battery 15 inserted into the supporting bottom plate 11 is positioned through the battery hole 14 of the supporting middle plate 12.

[0045] The support top plate 13 and the support bottom plate 11 are respectively provided with a water-cooled heat dissipation structure 190, and the water-cooled heat dissipation structure 190 includes a water-cooled cooling channel 193 formed on the support top plate 13, and a water-cooled inlet 191 is formed at one end of the water-cooled cooling channel 193, and a water-cooled outlet 192 is provided at the other end, and the water-cooled inlet 191 or the water-cooled outlet 192; the water-cooled inlet 191 is installed with a water-cooled water pump 194, and the water-cooled liquid can be passed into the water-cooled cooling channel 193 through the water-cooled water pump 194 to dissipate heat from the support top plate. It should be noted that the water-cooled heat dissipation structure 190 of the support bottom plate 11 is the same as the water-cooled heat dissipation structure 190 of the support top plate 13. Therefore, the specific water-cooled heat dissipation structure 190 of the support bottom plate 11 is not described in detail here.

[0046] The supporting bottom plate 11 is provided with a negative electrode connecting piece 4 connecting the negative electrodes of two adjacent lithium batteries 15, and the top hole 19 of the supporting top plate 13 is provided with an elastically flippable top cover 20, and the top cover 20 is installed with a positive electrode connecting piece 25 connected to the positive electrode of the lithium battery 15, and the positive electrode connecting pieces 25 of the two adjacent top covers 20 are electrically connected; after the lithium battery 15 is inserted, the top cover 20 will elastically flip and cooperate with the top hole 19 of the supporting top plate 13 under the action of elasticity, so that the positive electrode connecting piece 25 of the top cover 20 remains electrically connected to the positive electrode of the lithium battery 15.

[0047] The battery module 1 also includes a connecting structure connecting the supporting bottom plate 11, the supporting middle plate 12 and the supporting top plate 13. The supporting bottom plate 11, the supporting middle plate 12 and the supporting top plate 13 are arranged parallel to each other and spaced apart. The connecting structure includes guide connecting holes 16 coaxially arranged in the supporting bottom plate 11, the supporting middle plate 12 and the supporting top plate 13, respectively. A guide connecting column 17 is penetrated through the guide connecting hole 16 between the supporting bottom plate 11, the supporting middle plate 12 and the supporting top plate 13; wherein the supporting bottom plate 11 and the supporting top plate 13 are respectively provided with a locking connector 18 connected to the guiding connecting column 17; after the guiding connecting column 17 passes through the guiding connecting holes 16 of the supporting bottom plate 11, the supporting middle plate 12 and the supporting top plate 13 in turn, the top end and the bottom end of the guiding connecting column 17 are respectively exposed outwardly, and at this time, the locking connector 18 can be used to fix the supporting bottom plate 11, the supporting middle plate 12 and the supporting top plate 13 to ensure their parallelism and achieve fixed connection.

[0048] Specifically, the supporting top plate 13 is provided with an elastic hinge 2 for installing the top cover 20, one end of the elastic hinge 2 is fixed to the periphery of the top hole 19 of the supporting top plate 13, and the other end of the elastic hinge 2 is connected to the top cover 20. The elastic hinge 2 can elastically drive the top cover 20 to flip and approach the top hole 19, and the positive electrode connecting piece 25 installed at the bottom of the top cover 20 is formed with an elastic conductive block that elastically contacts the positive electrode of the lithium battery 15; under the elastic drive of the elastic hinge 2, the positive electrode connecting piece 25 installed with the elastic conductive block can be elastically flipped and approach the top hole 19, and the elastic conductive block can elastically contact the positive end of the lithium battery 15 to ensure conductivity.

[0049] Preferably, the elastic conductive block is a metal conductive block installed on the positive electrode connecting piece 25 through a compression spring.

[0050] The support top plate 13 is formed with a first conductive groove 26 and a second conductive groove 27, wherein the first conductive groove 26 is arranged along the direction of the support top plate 13, and the second conductive groove 27 is arranged along the width direction of the support top plate 13; the first conductive groove 26 and the second conductive groove 27 are respectively arranged with conductive connecting wires 28, and the conductive connecting wires 28 of the first conductive groove 26 and the second conductive groove 27 cooperate with each other and are conductively connected to the positive electrode connecting piece 25 of the top cover 20 in sequence; two adjacent positive electrode connecting pieces 25 are conductively connected through the conductive connecting wires 28 arranged in the first conductive groove 26 and the second conductive groove 27, thereby realizing parallel or series electrical connection of two adjacent lithium batteries 15; whether the top cover 20 is in a pressed state or an open state, the two adjacent positive electrode connecting pieces 25 are electrically connected through the conductive connecting wires 28 of the first conductive groove 26 and the second conductive groove 27; when disassembling and replacing the lithium battery 15, there is no need to move the positive electrode connecting piece 25.

[0051] Specifically, the elastic hinge 2 includes a rotating shaft 21, and the rotating shaft 21 is movable with a first hinge plate 22 and a second hinge plate 23. The first hinge plate 22 is formed with a first movable sleeve nested in the rotating shaft 21, and the second hinge plate 23 is formed with a second movable sleeve nested in the rotating shaft 21. The rotating shaft 21 is also nested with a torsion spring 24, one end of the torsion spring 24 is connected to the first hinge plate 22, and the other end of the torsion spring 24 is connected to the second hinge plate 23, and the second hinge plate 23 is fixedly mounted on the supporting top plate 13; under the elastic drive of the torsion spring 24, the first hinge plate 22 nested in the rotating shaft 21 will elastically approach the top hole 19, and the first hinge plate 22 rotates around the rotating shaft 21 through the first movable sleeve; ensure that the positive electrode connecting plate 25 installed on the first hinge plate 22 is in contact with the positive terminal of the lithium battery 15; when conducting, it can prevent the top cover 20 from bouncing up and causing disconnection.

[0052] The negative electrode connecting piece 4 includes a negative electrode piece 41 and a first negative terminal 42 and a second negative terminal 43 formed on the negative electrode piece 41; the negative electrode piece 41 is formed with an insulating connecting block 44 connected to the supporting base plate 11, and the supporting base plate 11 is formed with a movable connecting groove 45 for inserting the insulating connecting block 44, the cross-sectional shape of the movable connecting groove 45 is a cross shape, and a cross connecting block connected to the movable connecting groove 45 is formed at the bottom of the insulating connecting block 44; the insulating connecting block 44 of the negative electrode connecting piece 4 is inserted and installed into the movable connecting groove 45 of the supporting base plate 11 through the formed cross connecting block, so that the negative electrode connecting piece 4 can be fixedly installed in the supporting base plate 11; after the lithium battery 15 is inserted into the battery hole 14, the negative terminal at the bottom of the lithium battery 15 is conductively connected to the first negative terminal 42 of the negative electrode connecting piece 4; the positive terminal at the top of the lithium battery 15 is connected to the elastic conductive block of the positive electrode connecting piece 25 to achieve stable power supply.

[0053] The second negative terminal 43 of the negative electrode connecting sheet 4 is coaxially connected to the first negative terminal 42 of another negative electrode connecting sheet 4 , so that two adjacent negative electrode connecting sheets 4 can be conductively connected.

[0054] The first negative terminal 42 and the second negative terminal 43 are respectively formed with a raised conductive connection point 46, and the negative electrode of the lithium battery 15 is formed with a negative electrode conductive groove 47 that is in conductive contact with the conductive connection point 46. The negative electrode connecting sheet 4 is electrically connected to the negative electrode conductive groove 47 of the lithium battery 15 through the formed conductive connection point 46.

[0055] The battery drive seat 3 is provided with a disassembly mechanism for ejecting the lithium battery 15 from the battery module 1, and the disassembly mechanism includes a driving cavity formed in the battery drive seat 3, and an X-axis linear module 31 and a support guide rail 32 are arranged along the X-axis direction in the driving cavity. The X-axis linear module 31 can move along the length direction of the support guide rail 32, and a lifting drive seat 33 is installed at the driving end of the X-axis linear module 31. The lifting drive seat 33 is installed with a lifting seat 34 that can move in the Z-axis direction, and the lifting seat 34 is installed with an ejection pin 35. The support bottom plate 11 is provided with a bottom hole for the ejection pin 35 to pass through, and the negative electrode connecting plate 4 is provided with a negative electrode ejection hole 48 for the ejection pin 35 to pass through.

[0056] When the lithium battery 15 needs to be disassembled and replaced, the disassembly mechanism of the battery drive seat 3 works, and the ejector pin 35 of the lifting seat 34 can move in the X, Y, and Z axes. The ejector pin 35 can be moved to be coaxially aligned with the lithium battery 15 that needs to be disassembled, and then the ejector pin 35 passes through the bottom hole of the supporting base plate 11, and then passes through the negative electrode ejection hole 48 of the negative electrode connecting plate 4, so that the lithium battery 15 can be separated from the supporting base plate 11; the top of the lithium battery 15 will prop open the top cover 20, and the lithium battery 15 passes through the top hole 19 of the supporting top plate 13 to complete the separation, and realize disassembly and replacement. There is no need to disassemble the positive and negative electrode sheets 41, and the integrity of the battery module 1 can be guaranteed during disassembly and replacement.

[0057] Preferably, there are two support rails 32, which are parallel to each other. The support rails 32 are formed with guide sliding grooves 36 along the length direction, and guide sliding blocks that slide with the guide sliding grooves 36 are installed at both ends of the X-axis linear module 31; the bottom of the support rail 32 is formed with a bottom mounting groove 37 along the length direction, and the bottom mounting groove 37 is installed with a bottom linear module 38, and the driving end of the bottom linear module 38 is installed with a Y-axis driving seat 39, the top of the bottom mounting groove 37 is connected to the guide sliding groove 36, and the Y-axis driving seat 39 is connected to the guide sliding block. The X-axis linear module 31 and the bottom linear module 38 cooperate with each other, so that the lifting seat 34 can move in the X-axis and Y-axis directions, and the ejector pin 35 of the lifting seat 34 realizes Z-axis movement under the drive of the lifting cylinder.

[0058] Preferably, the first negative terminal 42 and the second negative terminal 43 are respectively formed with the negative electrode ejection hole 48 for the ejection pin 35 to pass through; all lithium batteries 15 can be ejected by the ejection pin 35 to achieve disassembly and replacement.

[0059] In summary, it can be seen that the present invention has the above-mentioned excellent characteristics, which can enhance the performance unprecedented in the prior art and become a product with great practical value.

[0060] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A high-density water-cooled lithium battery pack for new energy vehicles, comprising a battery drive seat and a battery module arranged on the top of the battery seat, characterized in that: The battery module comprises a supporting bottom plate, a supporting middle plate and a supporting top plate, wherein the supporting middle plate is provided with a battery hole, in which a lithium battery is installed, and the supporting top plate is provided with a top hole for inserting the lithium battery; The support top plate and the support bottom plate are respectively provided with a water-cooling heat dissipation structure, the water-cooling heat dissipation structure includes a water-cooling channel formed on the support top plate, a water-cooling inlet is formed at one end of the water-cooling channel, and a water-cooling outlet is provided at the other end, the water-cooling inlet or the water-cooling outlet; a water-cooling water pump is installed at the water-cooling inlet; The supporting bottom plate is provided with a negative electrode connecting piece for connecting the negative electrodes of two adjacent lithium batteries, the top hole of the supporting top plate is provided with an elastically flippable top cover, the top cover is equipped with a positive electrode connecting piece connected to the positive electrode of the lithium battery, and the positive electrode connecting pieces of the two adjacent top covers are electrically connected; The battery drive seat is provided with a disassembly mechanism for ejecting the lithium battery from the battery module, the disassembly mechanism includes a drive cavity formed in the battery drive seat, an X-axis linear module is arranged in the drive cavity along the X-axis direction and a support guide rail is arranged along the Y-axis direction of the drive cavity, the X-axis linear module can move along the length direction of the support guide rail, a lifting drive seat is installed at the driving end of the X-axis linear module, the lifting drive seat is installed with a lifting seat that can move in the Z-axis direction, and the lifting seat is installed with an ejection pin; The support bottom plate is provided with a bottom hole for the ejection pin to pass through, and the negative electrode connecting piece is provided with a negative electrode ejection hole for the ejection pin to pass through.

2. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 1, characterized in that: The battery module also includes a connection structure connecting the support bottom plate, the support middle plate and the support top plate, the connection structure includes guide connection holes coaxially arranged on the support bottom plate, the support middle plate and the support top plate, and guide connection columns are penetrated between the support bottom plate, the support middle plate and the support top plate through the guide connection holes; The supporting bottom plate and the supporting top plate are respectively provided with locking connectors connected with the guiding connecting columns.

3. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 2, characterized in that: The supporting top plate is provided with an elastic hinge for installing the top cover, one end of the elastic hinge is fixed to the periphery of the top hole of the supporting top plate, and the other end of the elastic hinge is connected to the top cover. The elastic hinge can elastically drive the top cover to flip close to the top hole, and the positive electrode connecting piece installed at the bottom of the top cover is formed with an elastic conductive block that elastically contacts the positive electrode of the lithium battery.

4. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 3, characterized in that: The support top plate is formed with a first conductive groove and a second conductive groove, wherein the first conductive groove is arranged along the direction of the support top plate, and the second conductive groove is arranged along the width direction of the support top plate; the first conductive groove and the second conductive groove are respectively arranged with conductive connecting wires, and the conductive connecting wires of the first conductive groove and the second conductive groove cooperate with each other to be conductively connected to the positive electrode connecting piece of the top cover in turn.

5. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 4, characterized in that: The elastic hinge comprises a rotating shaft, the rotating shaft movably has a first hinge plate and a second hinge plate, the first hinge plate is formed with a first movable sleeve nested in the rotating shaft, the second hinge plate is formed with a second movable sleeve nested in the rotating shaft, the rotating shaft is also nested with a torsion spring, one end of the torsion spring is connected to the first hinge plate, the other end of the torsion spring is connected to the second hinge plate, and the second hinge plate is fixedly mounted on the supporting top plate.

6. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 5, characterized in that: The negative electrode connecting sheet includes a negative electrode sheet and a first negative terminal and a second negative terminal formed on the negative electrode sheet; the negative electrode sheet is formed with an insulating connecting block connected to a supporting base plate, the supporting base plate is formed with a movable connecting groove for inserting the insulating connecting block, the cross-sectional shape of the movable connecting groove is a cross shape, and a cross connecting block connected to the movable connecting groove is formed at the bottom of the insulating connecting block.

7. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 6, characterized in that: The first negative terminal and the second negative terminal are respectively formed with raised conductive connection points, and the negative electrode of the lithium battery is formed with a negative electrode conductive groove that is in conductive contact with the conductive connection point.

8. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 7, characterized in that: The first negative terminal and the second negative terminal are respectively formed with negative electrode ejection holes for the ejection pin to pass through.

9. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 1, characterized in that: There are two support rails, which are parallel to each other. A guide sliding groove is formed along the length direction of the support rails. Guide sliding blocks that slide in cooperation with the guide sliding groove are installed at both ends of the X-axis linear module.

10. A high-density water-cooled lithium battery pack for new energy vehicles according to claim 9, characterized in that: A bottom mounting groove is formed along the length direction at the bottom of the support guide rail, a bottom linear module is installed in the bottom mounting groove, a Y-axis driving seat is installed at the driving end of the bottom linear module, the top of the bottom mounting groove is connected to the guide sliding groove, and the Y-axis driving seat is connected to the guide sliding block.

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