Detachable lithium battery pack

Abstract

The utility model discloses a detachable lithium battery pack which comprises a top protection cover plate, a reinforcing structure is arranged on the top protection cover plate, vertical side traction cover plates are arranged at the limit positions of the two sides, close to the length direction, of the lower portion of the top protection cover plate, and the two side traction cover plates are symmetrically arranged. An even number of pull rods are arranged on the side traction cover plate; vertical side panels are arranged below the top protection cover plate close to the limit position in the width direction, the two side panels are symmetrically arranged, and heat dissipation structures are arranged on the side panels; a cubic space is defined by the two side traction cover plates and the two side panels, and a total battery cell group reliably limited by the inner sides of the side traction cover plates and the inner sides of the side panels is arranged in the cubic space. According to the utility model, random combination of specifications of the lithium battery pack is realized by using the minimum battery cell group, and meanwhile, the rigidity and the reliability of the battery pack are ensured by adopting a parallel plug-in mounting structure, so that the lithium battery pack has certain innovativeness and practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy equipment, and particularly relates to a detachable lithium battery pack. Background Art

[0002] At present, lithium battery packs encapsulated by standard basic battery cells are increasingly applied to power batteries, civil power supply or energy storage facilities. Greater requirements are also put forward for the maintenance and conversion of lithium battery packs. In the prior art, a battery pack encapsulated by standard battery cells is used for a fixed purpose and is difficult to be repurposed when the demand changes; when some of the battery cells need to be replaced after a period of use, it is also difficult to reorganize and adjust the state of each standard battery cell.

[0003] Some detachable lithium battery packs have emerged. For example, CN218977389U discloses a battery pack disassembly and assembly structure, belonging to the technical field of battery pack disassembly and assembly. It solves the technical problems such as the unreliability of the existing warehouse-type battery pack during the plugging and unplugging process. This battery pack disassembly and assembly structure includes a housing and a battery pack. The housing is provided with a battery installation cavity for accommodating the battery pack, and the battery installation cavity forms an opening on the housing for the battery pack to be taken and placed. The housing is also provided with a locking member capable of fixing the battery pack in the battery installation cavity. The characteristic is that when the battery pack is inserted into the battery installation cavity, at least one surface of the battery pack except the end face can be contacted, and the user can simultaneously touch the locking member and the exposed surface of the battery pack with one hand. However, this solution is limited to the disassembly and assembly method of a fixed battery form and is difficult to be applied to more general application scenarios. Summary of the Utility Model

[0004] In view of the above technical problems, the utility model provides a detachable lithium battery pack, which can meet various requirements of smart cities. To solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0005] A detachable lithium battery pack, characterized in that: it includes a top protective cover plate, a reinforcement structure is arranged on the top protective cover plate, vertical side traction cover plates are arranged below the top protective cover plate near the limit positions on both sides in the length direction, the two side traction cover plates are symmetrically arranged, and an even number of pull rods are arranged on the side traction cover plates; vertical side panels are arranged below the top protective cover plate near the limit positions in the width direction, the two side panels are symmetrically arranged, and a heat dissipation structure is arranged on the side panels; the two side traction cover plates and the two side panels enclose a cubic space, the area of ​​the top protective cover plate is larger than the projection space of the cubic space on the horizontal plane; a total battery cell group reliably limited by the side traction cover plates and the inner sides of the side panels is arranged in the cubic space, the total battery cell group includes at least two rows and at least two columns of battery cell groups, the total battery cell group can be disassembled by row or by column, and the size specifications of the top protective cover plate, the side traction cover plates and the side panels are selected according to the actual battery cell group size of the total battery cell group.

[0006] Furthermore, a plurality of the battery cells form a minimum plug-in unit, the battery cells in the minimum plug-in unit are maintained in a parallel state along the height direction by a retaining frame structure, and the electrodes with the same name face the same direction; the minimum plug-in unit includes a top restraint, the top restraint is buckled on the plurality of the battery cells, and a top block is provided at the electrode position corresponding to each battery cell; a top plug-in male head is provided at one end of the top restraint, and a top plug-in female head is provided at the other end; the top plug-in male head can be reliably plugged with the top plug-in female head of another adjacent top restraint ; The top plug-in female connector can be reliably plugged with the top plug-in male connector of another top restraint; the minimum plug-in unit also includes a bottom restraint, the bottom restraint abuts against the other electrode of the plurality of battery cells, and a battery cell base is provided at the electrode position corresponding to each battery cell; a bottom plug-in male connector is provided at one end of the bottom restraint, and a bottom plug-in female connector is provided at the other end, the bottom plug-in male connector can be reliably plugged with the bottom plug-in female connector of another adjacent bottom restraint; the bottom plug-in female connector can be reliably plug-in with the bottom plug-in male connector of another bottom restraint.

[0007] Further, a plurality of the minimum plug-in units are connected to form a cell row, the cell row comprising a first cut-off piece located at one end, the first cut-off piece comprising a top cut-off female head, the top cut-off female head can be reliably plugged with the top plug-in male head; the first cut-off piece also comprises a bottom cut-off female head, the bottom cut-off female head can be reliably plugged with the bottom plug-in male head; after the plurality of the minimum plug-in units are plugged in end to end, the top plug-in male head of the frontmost minimum plug-in unit is plugged with the top cut-off female head; the bottom plug-in male head of the frontmost minimum plug-in unit is plugged with the bottom cut-off female head; the cell row comprises a tail cut-off piece located at one end, the tail cut-off male head on the tail cut-off piece can be reliably plugged with the top plug-in female head and the bottom plug-in female head.

[0008] Further, the cage structure includes horizontally arranged cross plates, and the cage structure further includes a male plug for inserting a battery cell group and a female plug for inserting a battery cell group facing the front side.

[0009] Further, the first cut-off member and the last cut-off member on the battery cell row are respectively provided with structures for butting and connecting with the corresponding first cut-off member and the last cut-off member on another adjacent battery cell row.

[0010] Advantages of the present utility model: This solution first realizes any combination of lithium battery pack specifications with the smallest battery cell group, and at the same time adopts a parallel plug-in structure to ensure the stiffness and reliability of the battery pack, which has certain innovation and practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is an assembly schematic diagram of the present application with the external protection device removed;

[0014] Figure 3 is an overall explosion schematic diagram of the present application;

[0015] Figure 4 is an isolated structural schematic diagram of the battery cell row of the present application;

[0016] Figure 5 is Figure 4 an explosion schematic diagram of;

[0017] Figure 6 is an overall schematic diagram of the smallest disassembly unit;

[0018] Figure 7 is Figure 6 an explosion schematic diagram of;

[0019] Figure 8 is a schematic diagram of the connection structure between different battery cell rows.

[0020] REFERENCE SIGNS

[0021] 1. Top protection cover plate

[0022] 2. Reinforcing structure

[0023] 3. Side traction cover plate

[0024] 4. Tie rod

[0025] 5. Side panel

[0026] 6. Heat dissipation structure

[0027] 7. Total battery cell group

[0028] 8. Battery cell

[0029] 9. Top restraint

[0030] 10. Top plug-in male head

[0031] 11. Top plug-in female head

[0032] 12. Top block

[0033] 13. Bottom restraint

[0034] 14. Battery cell holder

[0035] 15. Bottom plug-in male head

[0036] 16. Bottom plug-in female head

[0037] 17. First cut-off part

[0038] 18. Top cut-off female head

[0039] 19. Connecting male head

[0040] 20. Bottom cut-off female head

[0041] 21. Horizontal plate

[0042] 22. Battery cell group plug-in male head

[0043] 23. Battery cell group plug-in female head Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0045] Note that there are various electrical connection methods such as series connection, parallel connection, and hybrid connection between the battery cells of the lithium battery pack. The main innovation points of this application are in the structural connection and the battery cell grouping method. For the electrical connection method, including the layout of the electrode plates, the connection method of the non-detachable battery pack in the prior art can be adopted, and this application will not elaborate further.

[0046] A detachable lithium battery pack, characterized in that: it includes a top protection cover plate 1, a strengthening structure 2 is arranged on the top protection cover plate 1, vertical side traction cover plates 3 are arranged at positions close to the two extreme positions in the length direction below the top protection cover plate 1, the two side traction cover plates 3 are symmetrically arranged, and an even number of pull rods 4 are arranged on the side traction cover plates 3; vertical side plates 5 are arranged at positions close to the extreme positions in the width direction below the top protection cover plate 1, the two side plates 5 are symmetrically arranged, and a heat dissipation structure 6 is arranged on the side plates 5; the two side traction cover plates 3 and the two side plates 5 enclose a cubic space, and the area of the top protection cover plate 1 is larger than the projection space of the cubic space on the horizontal plane; a total battery cell group 7 reliably limited by the inner sides of the side traction cover plates and the side plates is arranged in the cubic space, the total battery cell group 7 includes at least two rows and at least two columns of battery cells 8 grouped together, the total battery cell group 7 can be disassembled row by row or column by column, and the size specifications of the top protection cover plate 1, the side traction cover plates 3 and the side plates 5 are selected according to the actual battery cell group size of the total battery cell group.

[0047] See the appendix Figure 2 , in the present application, the detachable lithium battery pack can be grouped in multiple rows. When the number of rows or columns changes, side plates with suitable specifications need to be selected. This is to maintain the stiffness and reliability of the entire battery pack by using prefabricated side plates or side traction cover plates when the total battery cell group is assembled.

[0048] Further, a plurality of the battery cells 8 form a minimum insertion unit, the battery cells in the minimum insertion unit are maintained in a parallel state along the height direction by a cage structure (see the appendix Figure 5 ), and the same-name electrodes face the same direction; the minimum insertion unit includes a top restraint 9, the top restraint 9 is buckled on a plurality of the battery cells, and a top block 12 is arranged at the electrode position corresponding to each battery cell; a top plug male head 10 is arranged at one end of the top restraint 9, and a top plug female head 11 is arranged at the other end; the top plug male head 10 can be reliably inserted into the top plug female head 11 of another adjacent top restraint 9; the top plug female head 11 can be reliably inserted into the top plug male head of another top restraint 9; the minimum insertion unit further includes a bottom restraint 13, the bottom restraint 13 abuts against the other electrodes of a plurality of the battery cells, and a battery cell base 14 is arranged at the electrode position corresponding to each battery cell; a bottom plug male head 15 is arranged at one end of the bottom restraint 13, and a bottom plug female head 11 is arranged at the other end, the bottom plug male head 15 can be reliably inserted into the bottom plug female head 16 of another adjacent bottom restraint 13; the bottom plug female head 16 can be reliably inserted into the bottom plug male head of another bottom restraint 13.

[0049] Further, a plurality of the minimum insertion units are connected to form a battery cell row. The battery cell row includes a first cut-off member 17 at one end. The first cut-off member includes a top cut-off female head 18, and the top cut-off female head 18 can be reliably inserted with the top insertion male head 10. The first cut-off member 17 further includes a bottom cut-off female head 20, and the bottom cut-off female head 20 can be reliably inserted with the bottom insertion male head. After a plurality of the minimum insertion units are inserted end to end, the top insertion male head 10 of the foremost minimum insertion unit is inserted with the top cut-off female head; the bottom insertion male head 15 of the foremost minimum insertion unit is inserted with the bottom cut-off female head. The battery cell row includes a tail cut-off member at one end, and the tail cut-off male head on the tail cut-off member can be reliably inserted with the top insertion female head and the bottom insertion female head.

[0050] Further, the cage structure includes a horizontal plate 21 arranged in parallel. The cage structure further includes a battery cell group insertion male head 22 and a battery cell group insertion female head 23 facing the front side.

[0051] Further, structures for opposing and connecting with the corresponding first cut-off member and tail cut-off member on an adjacent another battery cell row are respectively arranged on the first cut-off member and the tail cut-off member on the battery cell row.

[0052] When this solution is used, according to the specific requirements such as volume and power of the new battery-using occasion, a quantity-matched number of minimum battery cell units are correspondingly grouped; or sufficient battery cells are disassembled from an old large-scale battery pack and re-grouped, and then a suitable specification of packaging structure parts are selected for packaging to meet the requirements of the new place.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A detachable lithium battery pack, characterized in that: It includes a top protective cover plate, a reinforcement structure is arranged on the top protective cover plate, vertical side traction cover plates are arranged on the lower side of the top protective cover plate near the limit positions on both sides in the length direction, the two side traction cover plates are symmetrically arranged, and an even number of pull rods are arranged on the side traction cover plates; vertical side panels are arranged on the lower side of the top protective cover plate near the limit positions in the width direction, the two side panels are symmetrically arranged, and a heat dissipation structure is arranged on the side panels; the two side traction cover plates and the two side panels enclose a cubic space, and the area of ​​the top protective cover plate is larger than the projection space of the cubic space on the horizontal plane; a total battery cell group is arranged in the cubic space, which is reliably limited by the side traction cover plates and the inner sides of the side panels, and the total battery cell group includes at least two rows and at least two columns of battery cell groups, and the total battery cell group can be disassembled by rows or by columns, and the size specifications of the top protective cover plate, the side traction cover plates and the side panels are selected according to the actual battery cell group size of the total battery cell group.

2. A detachable lithium battery pack according to claim 1, characterized in that: A plurality of the battery cells form a minimum plug-in unit, the battery cells in the minimum plug-in unit are maintained in a parallel state along the height direction by a retaining frame structure, and the electrodes with the same name face the same direction; the minimum plug-in unit includes a top restraint, the top restraint is buckled on the plurality of the battery cells, and a top block is arranged at the electrode position corresponding to each battery cell; a top plug-in male head is arranged at one end of the top restraint, and a top plug-in female head is arranged at the other end; the top plug-in male head can be reliably plugged with the top plug-in female head of another adjacent top restraint; The top plug-in female connector can be reliably plugged into the top plug-in male connector of another top restraint; the minimum plug-in unit also includes a bottom restraint, the bottom restraint abuts against the other electrode of the plurality of battery cells, and a battery cell base is provided at the electrode position corresponding to each battery cell; a bottom plug-in male connector is provided at one end of the bottom restraint, and a bottom plug-in female connector is provided at the other end, the bottom plug-in male connector can be reliably plugged into the bottom plug-in female connector of another adjacent bottom restraint; the bottom plug-in female connector can be reliably plug-in with the bottom plug-in male connector of another bottom restraint.

3. A detachable lithium battery pack according to claim 2, characterized in that: A plurality of the minimum plug-in units are connected to form a battery cell row, wherein the battery cell row comprises a first cut-off piece located at one end, wherein the first cut-off piece comprises a top cut-off female head, and the top cut-off female head can be reliably plugged into the top plug-in male head; the first cut-off piece also comprises a bottom cut-off female head, and the bottom cut-off female head can be reliably plugged into the bottom plug-in male head; after the plurality of the minimum plug-in units are plugged in end to end, the top plug-in male head of the frontmost minimum plug-in unit is plugged into the top cut-off female head; the bottom plug-in male head of the frontmost minimum plug-in unit is plugged into the bottom cut-off female head; the battery cell row comprises a tail cut-off piece located at one end, and the tail cut-off male head on the tail cut-off piece can be reliably plugged into the top plug-in female head and the bottom plug-in female head.

4. A detachable lithium battery pack according to claim 3, characterized in that: The retaining frame structure includes horizontal plates arranged in parallel, and the retaining frame structure also includes a battery cell group plug-in male connector and a battery cell group plug-in female connector facing the front side.

5. A detachable lithium battery pack according to claim 4, characterized in that: The first cut-off piece and the tail cut-off piece on the battery cell row are respectively provided with structures that are aligned with and connected to the corresponding first cut-off piece and tail cut-off piece on another adjacent battery cell row.

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