CN109698311B

CN109698311B - Liquid-replaceable lithium slurry battery

Info

Publication number: CN109698311B
Application number: CN201710997294.3A
Authority: CN
Inventors: 谢晨; 陈永翀; 秦志健; 张彬; 何颖源; 张晓虎; 王玉伟; 张艳萍
Original assignee: Hebei Meijiang Battery Co ltd; Beijing Hawaga Power Storage Technology Co ltd
Current assignee: Beijing Hawaga Power Storage Technology Co ltd; Haofengguang Energy Storage Chengdu Co ltd
Priority date: 2017-10-24
Filing date: 2017-10-24
Publication date: 2021-06-15
Anticipated expiration: 2037-10-24
Also published as: CN109698311A

Abstract

The invention provides a liquid-replaceable lithium slurry battery, which comprises: the battery comprises a shell body consisting of a top cover and a lower shell body, a battery core and a discharge device. The discharge device comprises a supporting seepage part and a suction part, the battery cell is arranged on the supporting seepage part, the peripheral side wall of the battery cell is in sealing connection with the supporting seepage part, a seepage space and a discharge channel communicated with the seepage space are arranged on the supporting seepage part, the discharge channel is communicated with one end of the suction part in a fluid mode, and the other end of the suction part is connected with a discharge port on the top cover. The fluid in the battery core seeps downwards into the seepage space supporting the seepage part, and the fluid in the seepage space supporting the seepage part can be discharged from the liquid-replaceable lithium slurry battery through the discharge channel, the suction part and the discharge port by sucking from the discharge port on the top cover. By limiting the flow path of the electrolyte, the electrolyte is forced to flow out through the battery cell, the battery cell can be completely emptied and soaked by new liquid in the liquid changing process, and the liquid changing effect is remarkably improved.

Description

Liquid-replaceable lithium slurry battery

Technical Field

The invention relates to the field of lithium slurry batteries, in particular to a liquid-replaceable lithium slurry battery.

Background

The lithium slurry battery is a novel lithium ion battery, and the electrode of the lithium slurry battery contains part or all of the non-adhesive fixed conductive particles, so that when the battery is disturbed externally, the conductive particles can move freely to form a dynamic conductive network, thereby solving the problem of battery performance reduction caused by loosening and falling of the electrode material of the traditional lithium ion battery. More importantly, the fluid injection port, the discharge port and the flow channel are arranged on the battery, so that fluid in the battery can be changed, the problems of electrolyte failure, SEI (solid electrolyte interphase) film thickening, battery internal resistance increasing, cycle life reducing and the like are solved, and the maintenance and regeneration of the lithium slurry battery are realized.

The improvement of the liquid changing efficiency is a development target of a maintainable regeneration technology of the lithium slurry battery, and the efficient liquid changing can ensure that waste liquid in the battery core of the lithium slurry battery is fully discharged in the liquid changing process, so that the battery core can be fully soaked by new electrolyte. On the other hand, the total amount of electrolyte required in the liquid changing process can be saved due to efficient liquid changing, and therefore the maintenance cost of the battery is reduced. In the current mode of changing liquid, because the inside flow resistance of electricity core is great, the discharge port is flowed out from the free passageway all around of electric core to electrolyte mostly, leads to the inside electrolyte of electric core can not fully be updated, and the liquid effect of changing is not guaranteed.

Disclosure of Invention

In view of the above problems, the present invention provides a liquid-exchangeable lithium slurry battery, in which a discharge device having a support seepage part and a suction part is disposed in the battery, and the peripheral side wall of a battery cell is hermetically connected to the support seepage part of the discharge device, so that a fixed fluid flow path is formed in the battery cell, the support seepage part, and the suction part, and the flow path of the fluid is effectively defined, thereby overcoming the defect that the fluid is directly sucked out of the battery by bypassing the battery cell, and thus enabling sufficient liquid exchange of the battery cell.

The technical scheme provided by the invention is as follows:

according to the present invention, there is provided a liquid exchangeable lithium paste battery comprising: the shell comprises a top cover and a lower shell, wherein the top cover is provided with an injection port and a discharge port; the battery cell is accommodated in the shell; the discharge device comprises a supporting seepage part and a suction part, the battery cell is arranged on the supporting seepage part, the peripheral side wall of the battery cell is in sealing connection with the supporting seepage part, a seepage space and a discharge channel communicated with the seepage space are arranged on the supporting seepage part, the discharge channel is communicated with one end of the suction part in a fluid mode, the other end of the suction part is connected with a discharge port on the top cover, the fluid in the battery cell seeps downwards into the seepage space of the supporting seepage part, and the fluid in the seepage space of the supporting seepage part can be discharged from the liquid-replaceable lithium slurry battery through the discharge channel, the suction part and the discharge port by sucking from the discharge port on the top cover. The supporting seepage part not only plays a role in supporting the battery cell, but also plays a role in seepage fluid. That is, the supporting seepage part may be in the form of a plate, a block, a box or a combination thereof, at least the edge part of the supporting seepage part may support the cell, and the middle part of the supporting seepage part may also support the cell through a rib, a boss or the like. The seepage space supporting the seepage part can be, for example, a groove, a hole, a cavity and the like, and the fluid in the seepage space supporting the seepage part can be discharged through a discharge channel on the seepage part. The suction portion has one end in fluid communication with the discharge channel and the other end in fluid communication with the discharge port on the top cover, and fluid flowing out of the discharge channel supporting the seepage portion can be drawn out via the suction portion by suction from the discharge port on the top cover with the suction apparatus. The number of the discharge passages may be one or more.

The sealing connection between the peripheral side wall of the battery cell and the supporting seepage part is important, so that an optimal flow path for the fluid to flow downwards through the battery cell can be defined, and fluid channels outside the battery cell, such as the periphery of the battery cell and gaps between the battery cell and the supporting seepage part, are cut off, so that the fluid in the battery cell can be thoroughly discharged, and further, the full liquid change inside the battery cell of the lithium slurry battery can be realized. The sealing connection between the supporting seepage part and the peripheral side wall of the battery cell can be realized by a sealant, a sealing strip or a sealing ring and the like. The sealing glue can be polytetrafluoroethylene adhesive, high-performance instant glue, normal-temperature curing polytetrafluoroethylene glue and the like. In addition, the supporting seepage part and the peripheral side wall of the battery cell can also be realized by hot air welding, hot press welding or other modes. The part of the supporting seepage part, which is hermetically connected with the battery cell, can be selected according to the specific structure of the supporting seepage part. When the top surface or part of the top surface of the supporting seepage part is of a planar structure, the part of the peripheral side wall of the battery cell, which is adjacent to the bottom, can be hermetically connected with the planar part of the top surface of the supporting seepage part; or when the supporting seepage part is provided with a vertical side wall, the vertical side wall can be arranged around the periphery of the battery cell and is less than or equal to the height of the battery cell, and the upper end part, a plurality of parts or the whole vertical side wall of the vertical side wall can be hermetically connected with the peripheral side wall of the battery cell; or when the supporting seepage part is provided with a groove which is matched with the size of the battery cell, the battery cell can be placed in the groove, and the side wall of the groove can be hermetically connected with the peripheral side wall of the battery cell.

Next, a specific structure of the supporting seepage part in different embodiments will be described, and the main body of the supporting seepage part may be a supporting plate, a flow guide plate, a base, or the like.

The supporting seepage part can be a supporting plate, a diversion trench can be arranged on the supporting plate, the diversion trench is in fluid communication with a discharge channel arranged on the side wall of the supporting plate, and the diversion trench is a seepage space of the supporting seepage part. The flow guide grooves may be linear or continuously bent, such as S-shaped, wave-shaped, fold-shaped, etc., and the number of the flow guide grooves may be one or more, and at least one end of each flow guide groove is in fluid communication with the discharge channel.

The supporting seepage part can be provided with a guide plate with the height of h, a plurality of inclined grooves are arranged on the guide plate, the depth of each inclined groove is gradually deepened from zero, and the depth is smaller than or equal to the height h of the guide plate. The guide plate here differs from the above-described support plate in that the guide plate has a fluid-guiding effect, which can be achieved by means of inclined grooves provided on the guide plate. The fluid can be entirely led to one end of the baffle and discharged through the inclined grooves, so that the inclined grooves can be used as discharge channels without providing separate discharge channels on the side wall of the baffle. In addition, the inclined grooves also serve as seepage spaces.

The supporting seepage part can be provided with a guide plate with the height h, the upper surface of the guide plate is an inclined surface converging to one point, and preferably, the converging point is positioned on one edge of the guide plate and the height of the converging point is less than the height h of the guide plate. For example, the inclined surface may be a part of a conical surface, the apex of which serves as the convergence point; alternatively, the inclined surface may be a plurality of triangular inclined surfaces, and one vertex of each of the plurality of triangular inclined surfaces converges at the convergence point. The space above the inclined surface here can be used both as a seepage space and as a discharge channel.

The supporting seepage section may comprise only the above-mentioned baffle. However, when the cell cannot be stably supported due to more inclined grooves or larger inclined surfaces of the flow guide plate, the flow guide plate can be further provided with a seepage plate. The seepage plate can be arranged on the guide plate and fixedly connected with the guide plate, a plurality of through holes can be arranged on the seepage plate, and the fluid in the electric core can flow to the guide plate through the through holes on the seepage plate and then enter the suction part through the flow guide of the guide plate. The seepage plate can not only stably support the cell, but also enable fluid in the cell to seep downwards through the seepage plate. Under the condition that the supporting seepage part comprises a guide plate positioned below and a seepage plate positioned above, the peripheral side wall of the battery core is hermetically connected with the seepage plate, and the peripheral edges of the seepage plate and the guide plate are also hermetically connected.

The supporting seepage part can be a base, and the base comprises a protruding base side wall positioned at the peripheral edge of the base, a supporting table positioned on the inner side of the base side wall and a flow guide cavity (seepage space) positioned in the middle of the base. Preferably, the central portion of the bottom surface of the diversion cavity is higher than the edge portion and the highest point of the bottom surface of the diversion cavity is lower than the height of the support table. In addition, the bottom surface of the diversion cavity can also be any structure or combination of the upper surfaces of the diversion plates. The battery cell can be connected to the supporting table in a sealing mode, and fluid in the flow guide cavity can flow out through the discharge channel arranged on the supporting table and the side wall of the base.

The suction portion may be a flexible tube, a rigid tube, a channel integrally formed with the housing or a separate plate, or the like. The specific form of the suction part is related to the structure of the discharge channel supporting the seepage part. If the discharge channel is a hole, a convergence point, a tubular structure and the like, one end of the suction part or the whole suction part can be in the form of a flexible pipe, a rigid pipe or a tubular channel and the like corresponding to the discharge channel; if the discharge channel is wide (e.g., elongated, multiple grooves, or multiple holes in a row), one end of the suction portion (e.g., an elongated opening) may be in fluid communication with the entire discharge channel.

The suction part can comprise a vertical suction part and a horizontal suction part, wherein the vertical suction part can be a trapezoidal vertical suction box, the horizontal suction part can be a square horizontal suction box, the vertical suction box and the horizontal suction box are both of hollow box body structures, the wider lower end part of the vertical suction box is connected with and in fluid communication with the discharge channel supporting the seepage part, one end of the horizontal suction box is connected to the top end of the vertical suction box, and an opening on the other end of the horizontal suction box is connected to the discharge port of the top cover; alternatively, the vertical suction part is a vertical wall provided with, for example, a tubular vertical channel, the horizontal suction part is a horizontal bar provided with, for example, a tubular horizontal channel or a groove-like horizontal channel, the lower end part of the vertical channel in the vertical wall is connected and in fluid communication with the discharge channel supporting the effusion part, one end of the horizontal channel of the horizontal bar is in fluid communication with the vertical channel of the vertical wall and the other end of the horizontal channel of the horizontal bar is in fluid communication with the discharge port of the top cap.

The invention has the advantages that:

1) the electrolyte is forced to flow out through the battery cell by limiting the flow path of the electrolyte, so that the battery cell can be completely emptied and soaked by new liquid in the process of changing the electrolyte, the replacement rate of the electrolyte in the battery cell is greatly enhanced, and the effect of changing the electrolyte is remarkably improved;

2) the liquid collection efficiency of the liquid exchange system to the waste liquid is improved through the flow guide structure supporting the seepage part, so that the waste liquid can be rapidly discharged by the suction part, and the liquid injection efficiency of new liquid is indirectly improved;

3) different suction channels can be flexibly matched according to the internal structure of the battery, so that the utilization rate of the internal space of the battery is improved;

4) the seepage space of the seepage support part can collect electrode active conductive particles leaked from the electrode plate, so that short circuit caused by leakage of the electrode active conductive particles of the electrode plate is effectively prevented.

Drawings

Fig. 1 is a schematic view of a fluid flow path in a conventional lithium paste battery;

fig. 2 is a schematic diagram of fluid flow paths in a replaceable liquid lithium slurry battery according to the present invention;

FIG. 3 is a schematic view of an exhaust according to an embodiment of the present invention, wherein FIGS. 3(a) - (d) show the exhaust as a whole, the supporting effusion portion, the flow guide plate, and the fluid flow path, respectively;

fig. 4 is a schematic view of a discharge device according to another embodiment of the present invention, in which fig. 4(a) - (d) show the discharge device as a whole, a supporting effusion portion, a flow guide plate, and a fluid flow path, respectively;

FIG. 5 is a schematic view of a supporting seepage site according to an embodiment of the present invention;

fig. 6 is a schematic view of a supporting porous part according to another embodiment of the present invention, in which fig. 6(a) and 6(b) show an exploded view and an overall view of the supporting porous part, respectively.

List of reference numerals

1. 1' — coping

101. 101' — injection port

102. 102' -discharge port

2. 2' -lower housing

3. 3' -Electrical core

4' — discharge conduit

5 a-supporting seepage part

501-discharge channel

502-space for percolation flow

503-guide plate

504-seepage plate

505-through hole

506-inclined groove

507-base side wall

508-supporting bench

509-diversion cavity

510-vertical side wall

5 b-suction section

511-suction channel

512-vertical suction part

513-horizontal suction section

514-tubular vertical channel

515-groove-shaped horizontal channel

6-sealing part

Detailed Description

The invention will be further explained by embodiments in conjunction with the drawings.

Fig. 1 is a schematic view of a fluid flow path in a conventional lithium paste battery. In the prior art, a lithium paste battery may include: the battery comprises a shell, a battery cell and a discharge pipeline, wherein the shell comprises a top cover 1 ' and a lower shell 2 ', an injection port 101 ' and a discharge port 102 ' are arranged on the top cover 1 ', the battery cell 3 ' is placed on the bottom surface of the lower shell 2 ', one end of the discharge pipeline 4 ' is connected to the discharge port 102 ' of the top cover 1 ', and the other end of the discharge pipeline extends to the bottom of the lower shell 2 '. During the process of replacing the lithium paste battery, the electrolyte in the casing is pumped from the discharge port 102' by the pumping device, and bypasses the region with larger flow resistance (cell region) and flows from the region with smaller flow resistance (as shown by the arrow in fig. 1). This will result in the electrolyte in the cell not being sufficiently discharged, and further the effect of changing the electrolyte is affected.

Fig. 2 is a schematic diagram of fluid flow paths in a replaceable liquid lithium slurry battery according to the present invention. In the replaceable lithium slurry battery according to the present invention, the replaceable lithium slurry battery may include a case including a top cover 1 and a lower case 2, a cell, and a discharge device including a supporting seepage part 5a and a suction part 5b, wherein the top cover 1 is provided with an injection port 101 and a discharge port 102. The peripheral side wall of the battery cell 3 is hermetically connected with the supporting seepage part 5a of the discharge device. The discharge channel 501 supporting the seepage section 5a is in fluid communication with one end of the suction section 5b and the other end of the suction section 5b is connected to the discharge port 102 on the top cover. As can be seen in fig. 2, a fixed fluid flow path is defined by the cell and the seepage supporting sealing portion 6, the seepage space 502 supporting the seepage 5a, the discharge channel 501 supporting the seepage 5a, the suction channel 511 of the suction 5b and the discharge port 102. The electrolyte injected into the case through the injection port 101 first enters the battery cell 3, and when suction is performed from the discharge port 102 by the suction apparatus, the electrolyte in the battery cell seeps down into the seepage space 502 supporting the seepage part 5a, and is discharged out of the battery case via the discharge passage 501 and the suction passage 511 of the suction part 5 b. In this case, the electrolyte in the casing cannot bypass the battery core and is directly pumped out of the battery casing, but only is discharged out of the casing after passing through the battery core, so that the function of flushing the battery core can be achieved. It should be noted, however, that it is also possible to provide a further suction line in the housing, one end of which is connected to the discharge port and the other end extends to the bottom of the housing, so that the fluid in the cell and the housing can be sucked more quickly, simultaneously or successively. In addition, the seepage space of the seepage support part can collect electrode active conductive particles leaked from the electrode plate and discharge the electrode active conductive particles out of the battery case during the liquid replacement of the battery, so that the short circuit caused by the leakage of the electrode active conductive particles of the electrode plate can be effectively prevented.

Fig. 3 is a schematic view of a discharge device according to an embodiment of the present invention, in which fig. 3(a) - (d) show the discharge device as a whole, a supporting effusion portion, a flow guide plate, and a fluid flow path, respectively. As shown in fig. 3(a), the discharge device is composed of a supporting seepage part 5a and a suction part 5 b. Wherein, the suction portion 5b includes a vertical suction portion 512 and a horizontal suction portion 513, the vertical suction portion 512 is a trapezoidal and hollow vertical suction box, the horizontal suction portion 513 is a square and hollow horizontal suction box, the wider lower end of the vertical suction box is substantially the same as the width of the supporting seepage portion 5a and can be connected in a matching manner, one end of the horizontal suction box is connected to the top end of the vertical suction box and the opening on the other end of the horizontal suction box is connected to the discharge port of the top cover. The horizontal suction box and the vertical suction box may be connected together by fitting or may be integrally formed. As shown in fig. 3(b) - (c), the supporting seepage part has a double-layer structure, the upper layer is a seepage plate 504 and the lower layer is a diversion plate 503. The seepage plate 504 is a planar structure, a plurality of elongated through holes 505 are formed in the seepage plate 504, and the fluid in the battery cell can seep downward through the elongated through holes 505 in the seepage plate. The baffle 503 is provided with a plurality of parallel inclined grooves 506, the inclined grooves 506 are gradually inclined from one end of the baffle 503 to the other end, and the depth of the inclined grooves ranges from 0 to h, wherein h is the thickness of the baffle. The inclined grooves serve as a seepage space into which fluid can flow from above and as a discharge channel for leading out the fluid in the seepage space. The arrows in fig. 3(d) show the flow path of the fluid, and the fluid in the cell firstly flows downwards into the inclined groove on the guide plate through the through hole 505 on the seepage plate, then the fluid in the inclined groove flows towards the lower end and enters the cavity of the vertical suction box, then is sucked into the cavity of the horizontal suction box, and finally is sucked out of the battery shell through the opening on the top surface of the horizontal suction box, wherein the cavity of the vertical suction box and the cavity of the horizontal suction box are together the suction channel 511.

Fig. 4 is a schematic view of a discharge device according to another embodiment of the present invention, in which fig. 4(a) - (d) show the discharge device as a whole, a supporting effusion portion, a flow guide plate, and a fluid flow path, respectively. As shown in fig. 4(a), the discharge device is composed of a supporting seepage part 5a and a suction part 5 b. Wherein the suction part 5b comprises a vertical suction part 512 and a horizontal suction part 513, the vertical suction part 512 is a vertical wall provided with a tubular vertical channel 514, the horizontal suction part 513 is a horizontal bar provided with a groove-shaped horizontal channel 515, the lower end of the vertical wall is approximately the same as the width of the supporting seepage part 5a and can be matched and connected, one end of the horizontal bar is connected to the top end of the vertical wall and the upper surface of the horizontal bar is fixedly connected to the lower surface of the top cover, so that one end of the groove-shaped horizontal channel 515 on the horizontal bar is in fluid communication with the top end of the tubular vertical channel 514 and the other end of the groove-shaped horizontal channel 515 on the horizontal bar is in fluid communication with the discharge port. The horizontal bar and the vertical wall may be connected together by fitting or may be integrally formed. As shown in fig. 4(b) - (c), the supporting seepage part has a double-layer structure, the upper layer is a seepage plate 504 and the lower layer is a diversion plate 503. The seepage plate 504 is a planar structure, a plurality of elongated through holes 505 are formed in the seepage plate 504, and the fluid in the battery cell can seep downward through the elongated through holes 505 in the seepage plate. Three triangular inclined planes are arranged on the air deflector 503, one vertex of each triangle in the three triangular inclined planes is totally converged at a convergence point G, the convergence point G is positioned on one side of the air deflector, and the height of the convergence point G is lower than the height h of the air deflector. The arrows in fig. 4(d) show the flow path of the fluid, first the fluid in the cell goes down via the through-hole 505 on the percolation plate into the percolation space formed by the inclined surface on the diversion plate, then the fluid in the percolation space goes towards the convergence point G and into the lower end of the tubular vertical channel 514 in fluid communication with the convergence point G, then is sucked from the tubular vertical channel 514 into the groove-like horizontal channel 515 on the horizontal bar, and finally is sucked out of the battery case via the discharge port, wherein the suction channel is formed by the tubular vertical channel 514 and the groove-like horizontal channel 515.

FIG. 5 is a schematic view of a supporting seepage site according to an embodiment of the present invention. The support seepage part is in the form of a base, which comprises a base sidewall 507, a support table 508 and a diversion cavity 509. The support table 508 may be a groove recessed downward from the sidewall 507 of the base, and the size of the groove matches the size of the battery cell, so that the battery cell can be stably placed in the groove and the peripheral sidewall of the battery cell can be hermetically connected with the sidewall 507 of the base. The diversion cavity 509 is arranged in the middle of the support table 508, and the bottom surface of the diversion cavity 509 is a convex surface with a high middle part and low two ends, and the convex surface can guide the fluid in the diversion cavity to the two sides of the diversion cavity. Between the side walls of the diversion chamber 509 and the base side walls 507 are a plurality of exhaust channels 501, through which fluid directed to both sides of the diversion chamber can be drawn.

Fig. 6 is a schematic view of a supporting porous part according to another embodiment of the present invention, in which fig. 6(a) and 6(b) show an exploded view and an overall view of the supporting porous part, respectively. The supporting percolation portion shown in fig. 6 is different from the supporting percolation portion shown in fig. 5 in that the supporting percolation portion 5a in fig. 6 further comprises a vertical side wall 510 and a percolation plate 504, wherein the vertical side wall 510 and the percolation plate 504 are integrally formed into a box shape and can be fixedly connected to a support table 508, and the cells can be stably placed in the box-shaped structure. The vertical side wall can better play a role in maintaining and supporting the battery cell, and the upper end of the vertical side wall can be hermetically connected with the side wall of the battery cell.

The specific embodiments of the present invention are not intended to be limiting of the invention. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A replaceable liquid lithium paste battery, comprising: the shell comprises a top cover and a lower shell, and an injection port and a discharge port are arranged on the top cover; the battery cell is accommodated in the shell; discharge apparatus, discharge apparatus is including supporting seepage flow portion and suction portion, the electricity core set up in support on the seepage flow portion and the lateral wall all around of electricity core with support seepage flow portion sealing connection support be equipped with seepage flow space and with the discharge passage of seepage flow space fluid intercommunication, discharge passage with the one end fluid intercommunication of suction portion and the other end of suction portion connect in the discharge port on the top cap, the fluid in the electricity core infiltrates downwards and gets into in the seepage flow space of support seepage flow portion, through follow the discharge port on the top cap is sucked can with the fluid in the seepage flow space of support seepage flow portion is followed discharge passage, suction portion and discharge port are followed discharge in the lithium slurry battery of interchangeable liquid.

2. A liquid-exchangeable lithium slurry battery according to claim 1, wherein the supporting seepage part is hermetically connected with the peripheral side wall of the battery cell through a sealant, a sealing strip or a sealing ring,

the top surface of the support seepage part is a plane, and the parts of the peripheral side walls of the battery cell, which are adjacent to the bottom, are hermetically connected with the top surface of the support seepage part; alternatively, the first and second electrodes may be,

the supporting seepage part is provided with a vertical side wall, the vertical side wall is arranged around the periphery of the battery cell and is less than or equal to the height of the battery cell, and the upper end part of the vertical side wall is hermetically connected with the peripheral side wall of the battery cell; alternatively, the first and second electrodes may be,

the battery cell is arranged in the groove, and the side wall of the groove is hermetically connected with the peripheral side wall of the battery cell.

3. A liquid exchangeable lithium slurry battery of claim 1 or 2, wherein the support seepage part is a support plate with channels in fluid communication with the drainage channels provided on the side wall of the support plate.

4. The liquid-exchangeable lithium slurry battery according to claim 1, wherein the support seepage part is provided with a flow guide plate with a height h, the flow guide plate is provided with a plurality of inclined grooves, and the depth of each inclined groove is gradually deepened from zero and is less than or equal to the height h of the flow guide plate.

5. A liquid exchangeable lithium slurry battery of claim 1, wherein the support seepage part is provided with a baffle having a height h, the upper surface of the baffle is an inclined surface that converges at a point, the convergence point is located on one edge of the baffle and the height of the convergence point is less than the height h of the baffle.

6. A liquid replaceable lithium slurry battery according to claim 4 or 5, wherein the supporting seepage part is further provided with a seepage plate, the seepage plate is arranged above the flow guide plate and is fixedly connected to the flow guide plate, a plurality of through holes are formed in the seepage plate, and the electrolyte in the core can flow to the flow guide plate through the through holes in the seepage plate and enter the suction part through the flow guide of the flow guide plate.

7. A liquid replaceable lithium slurry battery according to claim 1 or 2, wherein the supporting seepage part is a base, the base comprises a protruding base side wall located at the peripheral edge of the base, a supporting platform located at the inner side of the base side wall, and a diversion cavity located at the middle part of the base, the battery cell can be connected to the supporting platform in a sealing manner, and fluid in the diversion cavity can flow out through the discharge channels arranged on the supporting platform and the base side wall.

8. The liquid exchangeable lithium slurry battery of claim 7, wherein a center portion of the bottom surface of the flow guide cavity is higher than an edge portion of the bottom surface and a highest point of the bottom surface of the flow guide cavity is lower than a height of the support ledge.

9. A liquid exchangeable lithium slurry battery of claim 1 or 2, wherein the suction portion is a flexible tube, a rigid tube, or a channel integrally formed with the housing.

10. A liquid exchangeable lithium slurry battery of claim 1 or 2, wherein the suction includes a vertical suction and a horizontal suction,

the vertical suction part is a trapezoidal vertical suction box, the horizontal suction part is a square horizontal suction box, the wider lower end part of the vertical suction box is connected with and in fluid communication with the discharge channel of the supporting seepage part, one end of the horizontal suction box is connected to the top end of the vertical suction box, and an opening on the other end of the horizontal suction box is connected to the discharge port of the top cover; alternatively, the first and second electrodes may be,

wherein the vertical suction part is a vertical wall provided with a vertical channel, the horizontal suction part is a horizontal bar provided with a horizontal channel, the lower end part of the vertical channel in the vertical wall is connected with and in fluid communication with the discharge channel of the supporting seepage part, one end of the horizontal channel of the horizontal bar is in fluid communication with the vertical channel of the vertical wall and the other end of the horizontal channel of the horizontal bar is in fluid communication with the discharge port of the top cover.