CN215896482U

CN215896482U - Lithium slurry battery

Info

Publication number: CN215896482U
Application number: CN202122053022.2U
Authority: CN
Inventors: 何颖源; 孙晨宇; 张彬; 陈永翀
Original assignee: Beijing Hawaga Power Storage Technology Co ltd
Current assignee: Haofengguang Energy Storage Chengdu Co ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-02-22
Anticipated expiration: 2031-08-27

Abstract

The utility model provides a large-sized lithium slurry battery which is in a flat block structure, the length-width-height ratio of the lithium slurry battery can be 10-50: 10: 1-5, and the width of the lithium slurry battery can be 200-600 mm. In the lithium slurry battery, a positive plate and a negative plate are overlapped in a crossed mode to form a large-sized battery core, the size of the positive plate and the size of the negative plate are slightly smaller than the size of the bottom face of a battery shell, the positive plate and the negative plate are stacked in the height direction of the battery, and the positive plate and the negative plate are parallel to the bottom face of the battery shell. M groups of positive pole lugs are led out from the positive pole piece, m groups of negative pole lugs are led out from the negative pole piece, the m groups of positive pole lugs are in conductive connection with n positive pole posts, and the m groups of negative pole lugs are in conductive connection with n negative pole posts, wherein m is more than or equal to 2, and n is more than or equal to 2. The battery case is provided with a plurality of discharge valves and an injection port for injecting a safety agent. The lithium slurry battery is safe and controllable, and is particularly suitable for the field of large-scale energy storage.

Description

Lithium slurry battery

Technical Field

The utility model relates to the field of batteries, in particular to a large-sized lithium slurry battery.

Background

The lithium slurry battery is a novel lithium ion battery. The lithium slurry battery has a three-dimensional porous battery core structure, and the electrode material layer contains a certain proportion of non-bonding fixed conductive particles, so that a dynamic conductive network can be formed in electrolyte, and the problems of battery capacity reduction, cycle life attenuation and the like caused by falling or loosening of the electrode material of the traditional lithium ion battery are avoided.

The development of renewable energy sources under the background of 'double carbon' requires the support of energy storage, the development of electrochemical energy storage is rapid, and a lithium ion battery becomes one of the electrochemical energy storage technologies with the development prospect due to the characteristics of high energy density, good cycle performance, environmental protection and no pollution. When the battery is applied to energy storage, a battery module is formed by connecting single batteries in series and parallel, a battery cluster is formed by connecting the battery modules in series and parallel, and a battery system is formed by connecting the battery cluster in series and parallel. If the capacity of the single battery is small, multiple levels of batteries are required to be connected in parallel to provide the battery capacity level, and a plurality of battery pack frames and a plurality of groups of lugs are arranged, so that the connection and assembly of the whole mechanical parts are complicated, the weight is increased, the calculation amount of a battery management system is complex, and the battery management is difficult. Therefore, energy storage requires a large capacity of unit battery cells. At present, the single capacity of the lithium ion battery generally does not exceed 500Ah, mainly because the battery core structure and the fully-sealed battery shell structure of the existing battery can not effectively ensure the safety of the battery, the larger the single capacity is, the more energy is released when the thermal runaway is caused, and once an accident happens, the combustion and explosion are easily caused, and the control is difficult.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a large lithium paste battery having a flat block structure, wherein the length-width-height ratio of the lithium paste battery may be 10-50: 10: 1-5, and the width of the lithium paste battery may be 200-600 mm. In the lithium slurry battery, a positive plate and a negative plate are overlapped in a crossed mode to form a large-sized battery core, the size of the positive plate and the size of the negative plate are slightly smaller than the size of the bottom face of a battery shell, the positive plate and the negative plate are stacked in the height direction of the battery, and the positive plate and the negative plate are parallel to the bottom face of the battery shell. M groups of positive pole lugs are led out from the positive pole piece, m groups of negative pole lugs are led out from the negative pole piece, the m groups of positive pole lugs are in conductive connection with n positive pole posts, and the m groups of negative pole lugs are in conductive connection with n negative pole posts, wherein m is more than or equal to 2, and n is more than or equal to 2. A plurality of discharge valves are provided on a case of the battery, and an injection port for injecting a safety agent or an electrolyte is provided. The lithium slurry battery is safe and controllable, and is particularly suitable for the field of large-scale energy storage.

The technical scheme provided by the utility model is as follows:

the utility model provides a lithium slurry battery, which comprises a shell, a battery core, a first electrode pole end plate and a second electrode pole end plate, wherein the shell comprises a top surface and a bottom surface which extend along the length and width direction of the battery, a front surface and a rear surface which extend along the length and height direction of the battery, and two side surfaces which extend along the width and height direction of the battery, the front surface of the shell is provided with a strip-shaped through hole, the whole rear surface of the shell is provided with an opening, the shell can be made of electrolyte-resistant plastics, such as polypropylene, polyethylene, polytetrafluoroethylene and the like, and can also be made of light high-strength metal materials, such as aluminum or aluminum alloy, stainless steel and the like, and the thickness of the shell can be 0.5-3 mm. The battery core is formed by alternately superposing a plurality of positive plates and a plurality of negative plates along the height direction of the battery, the battery core comprises m groups of first electrode tabs and m groups of second electrode tabs, the first electrode tab end plate can be fixedly connected to the strip-shaped through hole, the first electrode tab end plate is provided with n first electrode tabs, the second electrode tab end plate can be fixedly connected to the opening of the shell, the second electrode tab end plate is provided with n second electrode tabs, the m groups of first electrode tabs of the battery core are respectively and electrically connected to the n first electrode tabs, the m groups of second electrode tabs of the battery core are respectively and electrically connected to the n second electrode tabs, m is more than or equal to 2, n is more than or equal to 2, the positive plates and the negative plates of the battery are placed in parallel with the bottom surface of the battery, the aspect ratio of the lithium slurry battery is 1/1-5/1, the height-width ratio is 1/10-1/2, and the width ratio of the lithium slurry battery is 200-600 mm. Preferably, the aspect ratio of the lithium paste battery is 2/1-4/1, the aspect ratio is 1/6-1/4, and the width of the lithium paste battery is 300-400 mm.

In the electric core of the lithium slurry battery, the positive plate comprises non-adhesive fixed positive active conductive particles and a porous positive current collector, and the negative plate comprises non-adhesive fixed negative lithium storage conductive particles and a porous negative current collector. In the liquid-free cell, the bulk porosity of the non-adhesively secured positive electrode active conductive particles and/or the non-adhesively secured negative electrode lithium storage conductive particles can be greater than 5% and less than 60%. In the case of immersion in the electrolyte, the non-adhesively secured positive electrode active conductive particles and/or the non-adhesively secured negative electrode lithium storage conductive particles are able to move in the electrolyte and form a positive electrode slurry and/or a negative electrode slurry, respectively. The mass ratio of the positive electrode active conductive particles to the positive electrode slurry may be 10% to 90%, preferably 15% to 80%, and the mass ratio of the negative electrode lithium storage conductive particles to the negative electrode slurry may be 10% to 90%, preferably 15% to 80%. The average particle size of the positive active conductive particles can be 0.05-500 mu m, and the mass ratio of the positive active material to the conductive agent can be 20-98: 80-2; the average particle size of the negative electrode lithium storage conductive particles can be 0.05-500 mu m, and the mass ratio of the negative electrode lithium storage material to the conductive agent can be 20-98: 80-2.

The ratio of the length, the width and the height of the shell of the lithium slurry battery is about 10-50: 10: 1-5, and the width of the battery can reach 200-600 mm. The size of the positive plate and the negative plate of the battery core is slightly smaller than the bottom surface of the shell, for example, the length of the positive plate and the negative plate is smaller than the length of the shell by 20mm, and the width of the positive plate and the negative plate is smaller than the width of the shell by 20mm, so that a certain gap exists between the positive plate and the negative plate and the vertical wall of the battery shell. All positive pole lugs of all positive pole pieces are located one side of the battery cell and are divided into a plurality of groups of positive pole lugs (m groups), all negative pole lugs of all negative pole pieces are located the opposite side of the battery cell and are divided into a plurality of groups of negative pole lugs (m groups), the lugs of all groups are arranged in parallel rows, and a group of lugs in each row can be continuous lugs or discontinuous lugs with discontinuous middle parts. A plurality of positive pole utmost point posts (n) are roughly evenly arranged along the length direction of anodal utmost point ear, a plurality of negative pole utmost point posts (n) are roughly evenly arranged along the length direction of negative pole utmost point ear, and the anodal utmost point ear of multiunit is connected with a plurality of positive pole utmost point posts electricity respectively, and multiunit negative pole utmost point ear is connected with a plurality of negative pole utmost point posts electricity respectively. Preferably, the number m of the positive electrode tabs can be 2-3 groups, the number m of the negative electrode tabs can be 2-3 groups, the number n of the first electrode poles can be 5-8, and the number n of the second electrode poles can be 5-8. Set up multiunit utmost point ear and a plurality of utmost point post and can ensure that the current distribution of great pole piece is even, satisfy large capacity battery cell heavy current charge-discharge demand, the monomer electricity core of many utmost point posts can directly correspond when the battery is established ties in parallel and connect, and the transmission after the heavy current dispersion, many utmost point posts provide multiple guarantee for the current transfer, even have a set of utmost point post to connect to appear not hard up, also can reduce the influence to the minimum, be unlikely to appear that utmost point post generates heat, connect accidents such as inefficacy.

The shell of the battery can be an integrated square tube with a completely opened back, and a long strip-shaped through hole is formed by opening a hole in the front of the shell; or the shell of the battery comprises a square barrel with the front and the back completely opened and a cover plate shaped like a Chinese character 'hui', the outer edge of the cover plate can be fixedly connected with the opening in the front of the battery, and the through hole in the middle of the cover plate forms a long strip-shaped through hole. That is, the front of the shell is provided with a strip-shaped through hole, and the size of the strip-shaped through hole is smaller than the size of the peripheral edge of the front of the shell; the rear face of the housing is provided with an opening having a size substantially equal to the size of the peripheral edge of the rear face of the housing. The size of the first electrode pole end plate is approximately equal to that of the strip-shaped through hole, so that the first electrode pole end plate can be fixedly connected to the strip-shaped through hole, a plurality of first electrode poles are arranged on the first electrode pole end plate, the first electrode poles can be anode poles and also can be cathode poles, and the first electrode pole end plate and the shell and the first electrode pole end plate are respectively in sealing connection. The size of the second electrode post end plate is approximately equal to the size of the opening at the back of the shell, so that the second electrode post end plate can be fixedly connected with the opening at the back of the shell, a plurality of second electrode posts are arranged on the second electrode post end plate, the second electrode posts can be negative electrode posts and also positive electrode posts, and the second electrode post end plate and the shell and the second electrode post end plate are respectively in sealing connection. The size of the second electrode pole terminal plate is larger than that of the first electrode pole terminal plate. In the installation process, firstly, m groups of first electrode tabs of the battery cell are respectively in conductive connection with n first electrode posts on a first electrode post end plate, and m groups of second electrode tabs of the battery cell are respectively in conductive connection with n second electrode posts on a second electrode post end plate; then, inserting the first electrode pole end plate and the battery cell into the shell from an opening in the back of the shell, wherein the first electrode pole end plate is aligned with the strip-shaped through hole, and the second electrode pole end plate is aligned with the opening in the back of the shell; and finally, the first electrode pole end plate is hermetically connected with the edge of the strip-shaped through hole, and the second electrode pole end plate is hermetically connected with the edge of the opening in the back of the shell. Through setting up less first electrode utmost point post end plate for less first electrode utmost point post end plate can pass battery case's inside, consequently can be outside with the electrode utmost point post welding of electricity core earlier with electrode utmost point post or electrically conductive bonding back, insert the shell with electricity core again. This eliminates the need for the following conventional steps: insert the electric core into the outer casing earlier, draw forth longer electrode tab, accomplish the welding or bonding of electrode tab and electrode utmost point post outside the battery, place unnecessary electrode tab in the shell of buckling again, saved the material of electrode tab and practiced thrift the inside space of battery from this, because the electric core size is bigger moreover, it is easier to carry out the electric connection operation of electric core tab and utmost point post before the shell is gone into to the electric core.

The large-sized battery is easy to face the problems of thermal runaway and the like, and the battery with a fault generates more gas, so that a single or a plurality of discharge valves are arranged on at least one side surface of the battery, and when the single discharge valve is arranged, the ratio of the flow passage area after the discharge valve is opened to the area of one side surface of the battery is preferably 1/10-1/5. If a plurality of discharge valves are arranged, the problem that a single discharge valve is difficult to meet the large-scale gas production of a large-scale battery is solved, and further, battery explosion caused by incapability of timely exhausting is avoided. The number of the plurality of discharge valves may be, for example, 2 to 4. The ratio of the total area of the flow channels after the discharge valves are opened to the area of one side surface of the battery is preferably 1/10-1/5. The vent valve may be in the form of a pressure-opened one-way valve, an explosion-proof valve mounted on the vent passage, or may be an explosion-proof membrane integral with the battery housing.

In order to further improve the safety of the large-scale lithium paste battery, the safety agent can be timely injected into the lithium paste battery under the condition of a battery core failure by utilizing the specific internal porous structure of the lithium paste battery and arranging an injection port for injecting the safety agent on the second electrode terminal plate or the shell of the battery. Different from a common lithium ion battery, the battery core of the lithium slurry battery is of a porous structure, so that the safety agent can be allowed to rapidly enter the battery core, and thermal runaway inside the battery can be rapidly controlled. The safener may be: one or more of carbon dioxide, nitrogen, argon, helium, sulfur dioxide, heptafluoropropane and dodecafluoro-2-methyl-3-pentanone; or one or more of alkyl phosphate, aromatic phosphate, phosphite, phosphazene, phosphorus-halogen organic compound, tricresyl phosphate, dimethyl methyl phosphate, hexamethylphosphoramide, tetrabromobisphenol, phosphaphenanthrene derivative, nitrogen phosphorus alkene additive and phosphazene compound; or water, silicone oil, foam extinguishing agent or aerosol extinguishing agent, etc. When the battery fails, the internal gas pressure of the battery is increased, so that the exhaust valve is opened and the gas in the battery is exhausted, the safety agent is injected into the battery, and waste liquid and waste gas in the battery can be exhausted through the opened exhaust valve. When the battery is used for a period of time and the electrolyte is deficient, the electrolyte can be replenished through the injection port of the battery, so that the service life of the battery is prolonged.

According to the utility model, the third electrode can be used for supplementing lithium to the large lithium slurry battery, so that the service life of the battery is prolonged. And arranging a lithium-containing metal body in the battery cell, arranging a third electrode on the second electrode pole terminal plate, and connecting the lithium-containing metal body and the third electrode in a conductive manner. The material of the lithium-containing metal body may be metallic lithium or a lithium-based alloy. The lithium-containing metal body can be closely adjacent to the positive plate, the first electrode tab is the negative electrode tab of the negative plate, the first electrode pole is the negative pole, the second electrode tab is the positive pole tab of the positive plate, and the second electrode pole is the positive pole. When the lithium is supplemented to the positive plate, the positive pole column is connected with the positive pole of the charge and discharge equipment, and the third electrode is connected with the negative pole of the charge and discharge equipment. Or, the lithium-containing metal body can be closely adjacent to the negative plate, the first electrode tab is the positive electrode tab of the positive plate, the first electrode pole is the positive electrode pole, the second electrode tab is the negative electrode tab of the negative plate, and the second electrode pole is the negative electrode pole. When the lithium is supplemented to the negative plate, the negative pole column is connected with the positive pole of the charge and discharge equipment, and the third electrode is connected with the negative pole of the charge and discharge equipment.

It should be noted that the directional terms upper, lower, left, right, front, rear, etc. in the present invention are only used for clarity of presentation and do not serve any limiting purpose.

The utility model has the advantages that:

1) the large lithium slurry battery improves the energy density of a system and reduces the complexity of monitoring, controlling and safely maintaining the system by improving the size and the capacity of a single battery.

2) The design of a plurality of utmost points post ensures that the current distribution of great pole piece is even, improves the reliability of electricity connection between the battery, satisfies the heavy current charge-discharge demand of large capacity battery cell.

3) The large-area discharge valve or the plurality of discharge valves are designed to meet the problem of large-scale gas production of large-scale batteries, and further battery explosion caused by incapability of timely discharging gas is avoided.

4) The setting can be opened the filling opening, can be used for pouring into the safener, directly pours into the battery inside into, can in time block the thermal runaway region and spread fast in large capacity battery cell is inside, also can be used for replenishing battery cyclic loss's electrolyte, the life of extension battery.

5) The third electrode for lithium supplement is led out through the terminal plate of the pole, and active lithium lost in the battery cycle can be supplemented through the charge and discharge of the third electrode and the anode or the cathode of the battery, so that the service life of the battery is prolonged.

Drawings

Fig. 1(a) and 1(b) are overall schematic diagrams of a lithium paste battery;

FIG. 2 is a schematic view of an electrode post end plate;

fig. 3(a) and 3(b) are schematic diagrams illustrating connection of a cell and an electrode terminal end plate of a lithium paste battery;

fig. 4(a) and 4(b) are schematic diagrams of a first embodiment of a housing of a lithium paste battery;

fig. 5(a) and 5(b) are schematic views of a second embodiment of a case of a lithium paste battery.

List of reference numerals

1-outer cover

101-elongated through hole

102, 102' — opening

103-square-shaped cover plate

2-electric core

201, 201' -positive pole tab

202, 202' -negative pole tab

3-first electrode terminal plate

301-negative electrode post

4-second electrode terminal plate

401-positive pole

402-third electrode

403-injection port

5-discharge valve

Detailed Description

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

Fig. 1(a) and 1(b) are overall schematic views of a lithium paste battery, fig. 1(a) is an overall schematic view viewed from the front of the battery, and fig. 1(b) is an overall schematic view viewed from the rear of the battery. As shown in fig. 1(a) and 1(b), the ratio of the length L, width W, and height H of the lithium paste battery was 7:5:1, and the width W of the battery was 400 mm. The lithium paste battery includes a case 1, a cell (not shown in fig. 1(a) and 1 (b)), a first electrode terminal plate 3, and a second electrode terminal plate 4. Six cathode poles 301 are arranged on the first electrode pole end plate 3 positioned in front of the battery, six anode poles 401 and a third electrode 402 are arranged on the second electrode pole end plate 4 positioned behind the battery, and the current uniformity of the large electrode plate can be improved by arranging a plurality of electrode poles along the length direction of the electrode plate. The third electrode 402 is arranged near the anode pole 401, lithium can be conveniently supplemented to the anode, lithium supplementing capacity of the battery can be conveniently and accurately quantified by supplementing lithium to the anode, and the potential difference between the anode of the battery and the third electrode is large, so that diffusion and control of lithium supplementing potential of lithium ions under the potential effect are facilitated, and lithium supplementing efficiency and uniformity are improved. Three exhaust valves 5 are arranged on one side surface of the battery, an injection port 403 is arranged on the second electrode pole terminal plate 4 behind the battery, the exhaust valves 5 can be used for exhausting and discharging air, a plurality of exhaust valves 5 can ensure a large amount of exhausted and discharged air rapidly, so that the safety requirement of a large-sized battery is met, and the injection port 403 can be used for injecting a safety agent into the battery shell 1.

Fig. 2 is a schematic diagram of an electrode post end plate, as shown in fig. 2, six negative electrode posts 301 are provided on the first electrode post end plate 3, six positive electrode posts 401, a third electrode 402 and an injection port 403 are provided on the second electrode post end plate 4, and the size of the first electrode post end plate 3 is smaller than that of the second electrode post end plate 4. The positive electrode terminal 401 and the negative electrode terminal 301 each include a portion located on one side of the electrode terminal end plate for series-parallel connection between the battery cells and a portion located on the other side of the electrode terminal end plate for electrical connection with the electrode tabs. In the embodiment shown in fig. 2, in each electrode pole, the portion for electrically connecting with the electrode tab is a U-shaped structure having two fins, each fin can be electrically connected with a portion of one set of electrode tab, and the two fins of the U-shaped structure correspond to the case where the battery cell has two sets of positive electrode tabs 201 and two sets of negative electrode tabs. That is, the six fins on one side are electrically connected to one of the two sets of electrode tabs, the six fins on the other side are electrically connected to the other of the two sets of electrode tabs, and the six fins are arranged substantially uniformly along the length direction of the electrode tabs. In addition, the portion for electrical connection with the electrode tabs may also have a structure with more rows of fins, so that electrical connection with more sets of electrode tabs may be made.

Fig. 3(a) and 3(b) are schematic views illustrating connection between a cell and an electrode terminal plate of a lithium paste battery, and fig. 3(a) and 3(b) are a schematic perspective view and a schematic side view, respectively. As shown in fig. 3(a) and 3(b), the positive electrode sheet and the negative electrode sheet are stacked in a crossing manner, two sets of positive electrode tabs 201 and 201 'are extended from the positive electrode sheet, two sets of positive electrode tabs are arranged in parallel rows, two sets of negative electrode tabs 202 and 202' are extended from the negative electrode sheet, two sets of negative electrode tabs are arranged in parallel rows, and the positive electrode tabs 201 and 201 'and the negative electrode tabs 202 and 202' may be respectively located on two opposite sides of the battery cell 2. A lithium-containing metal body is disposed proximate to the one or more positive electrode sheets. Before the battery cell 2 is not placed in the housing, two sets of negative electrode tabs 202 and 202 'are respectively welded with six negative electrode posts 301, two sets of positive electrode tabs 201 and 201' are respectively welded with six positive electrode posts 401, and the lithium-containing metal body is in conductive connection with a third electrode 402.

Fig. 4(a) and 4(b) are schematic views of a first embodiment of a case of a lithium paste battery, and fig. 4(a) and 4(b) are perspective views of the case, respectively, as viewed from different directions. As shown in fig. 4(a) and 4(b), the case 1 of the battery may be an integrated square tube with a rear face completely opened, and an elongated through hole 101 is formed by opening a hole in a front face of the case 1. The rear opening 102 has substantially the same dimensions as the second electrode post end plate 4, so that the second electrode post end plate 4 can be fitted into the opening 102 at the rear of the housing and sealingly connected. The dimensions of the elongated through hole 101 are substantially the same as the dimensions of the first electrode terminal plate 3, so that the first electrode terminal plate 3 can be fitted into the elongated through hole 101 and sealingly connected.

Fig. 5(a) and 5(b) are schematic views of a second embodiment of a case of a lithium paste battery, and fig. 5(a) and 5(b) are perspective views of the case, respectively, viewed from different directions. As shown in fig. 5(a) and 5(b), the battery case 1 includes a square tube having a front and a rear face both completely opened, and a cover plate 103 shaped like a Chinese character 'hui'. The rear opening 102 has substantially the same dimensions as the second electrode post end plate 4, so that the second electrode post end plate 4 can be fitted into the opening 102 at the rear of the housing and sealingly connected. The double-square cover plate 103 can be fixedly mounted to the front of the housing, the outer edge of the double-square cover plate 103 has approximately the same size as the opening 102' in the front of the housing, the inner hole of the double-square cover plate 103 forms an elongated through hole 101, and the inner hole edge of the double-square cover plate 103 has approximately the same size as the first electrode post end plate 3, so that the first electrode post end plate 3 can be mounted to the inner hole of the double-square cover plate 103 and hermetically connected.

When installing the electric core that is connected with first electrode utmost point post end plate and second electrode utmost point post end plate into the shell, put into the shell with less first electrode utmost point post end plate 3 and electric core 2 from the opening 102 behind the shell earlier, the electrode slice of electric core is parallel with the bottom surface of shell, and first electrode utmost point post end plate 3 is installed to the preceding rectangular shape through-hole 101 of shell, and inside electric core 2 all got into the shell, and second electrode utmost point post end plate 4 covers opening 102 behind the shell. The first electrode terminal plate 3 and the second electrode terminal plate 4 are hermetically connected to the battery case 1 by welding, thereby completing the assembly of the battery.

The specific embodiments of the present invention are not intended to be limiting of the utility model. 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 lithium slurry battery is characterized in that the lithium slurry battery comprises a shell, an electric core, a first electrode pole end plate and a second electrode pole end plate, wherein the shell comprises a top surface and a bottom surface which extend along the length and width direction of the battery, a front surface and a back surface which extend along the length and height direction of the battery, and two side surfaces which extend along the width and height direction of the battery, the front surface of the shell is provided with a strip-shaped through hole, the whole back surface of the shell is provided with an opening, the electric core is formed by alternately superposing a plurality of positive plates and a plurality of negative plates along the height direction of the battery, the positive plates and the negative plates of the electric core are arranged in parallel with the bottom surface of the battery, the electric core comprises m groups of first electrode lugs and m groups of second electrode lugs, the first electrode pole end plate can be fixedly connected with the strip-shaped through hole, and the first electrode pole end plate is provided with n first electrode poles, the second electrode pole end plate can be fixedly connected to the opening of the shell and is provided with n second electrode poles, m groups of first electrode lugs of the battery cell are electrically connected to the n first electrode poles respectively, m groups of second electrode lugs of the battery cell are electrically connected to the n second electrode poles respectively, m is larger than or equal to 2, n is larger than or equal to 2, the aspect ratio of the lithium slurry battery is 1/1-5/1, the aspect ratio of the lithium slurry battery is 1/10-1/2, and the width of the lithium slurry battery is 200-600 mm.

2. The lithium paste battery according to claim 1, wherein the lithium paste battery has an aspect ratio of 2/1-4/1, an aspect ratio of 1/6-1/4, and a width of 300-400 mm.

3. The lithium paste battery according to claim 1, wherein a single discharge valve is provided on one of the side surfaces of the battery, and the ratio of the flow passage area of the single discharge valve after opening to the area of the one side surface of the case is 1/10-1/5.

4. The lithium paste battery according to claim 1, wherein a plurality of discharge valves are provided on one of the side surfaces of the battery, and the number of the discharge valves is 2 to 4.

5. The lithium paste battery according to claim 4, wherein a ratio of a total area of flow channels after the discharge valves are opened to an area of one side surface of the case is 1/10-1/5.

6. The lithium paste battery according to claim 1, wherein an injection port for injecting a fluid is provided on the second electrode terminal plate.

7. The lithium paste battery according to claim 1, wherein the number of said first electrode posts is 5 to 8, and the number of said second electrode posts is 5 to 8.

8. The lithium paste battery of claim 1, wherein a lithium-containing metal body is disposed in the cell, and a third electrode is disposed on the second electrode terminal plate, the lithium-containing metal body being conductively coupled to the third electrode.

9. The lithium slurry battery according to claim 8, wherein the lithium-containing metal body is adjacent to the positive plate, the first electrode tab is a negative electrode tab of the negative plate, the first electrode tab is a negative electrode post, the second electrode tab is a positive electrode tab of the positive plate, and the second electrode tab is a positive electrode post.

10. The lithium slurry battery according to claim 8, wherein the lithium-containing metal body is adjacent to the negative electrode sheet, the first electrode tab is a positive electrode tab of the positive electrode sheet, the first electrode tab is a positive electrode post, the second electrode tab is a negative electrode tab of the negative electrode sheet, and the second electrode tab is a negative electrode post.

11. The lithium paste battery according to claim 1, wherein the case of the battery is an integrated square tube having a rear face completely opened, and the elongated through-hole is formed by opening a hole in a front face of the case; or the shell of the battery comprises a square barrel with a front surface and a back surface which are completely opened and a cover plate in a shape like a Chinese character 'hui', the outer edge of the cover plate can be fixedly connected with the opening in the front surface of the battery, and the middle through hole of the cover plate forms the long strip-shaped through hole.