CN219759887U - Novel CTP battery pack - Google Patents

Abstract

The utility model provides a novel CTP battery pack, which comprises a hollow bottom shell; at least one pair of first longitudinal beams are arranged on the two side surfaces of the bottom shell at intervals; the adjacent end surfaces of at least one pair of first longitudinal beams are provided with first clamping grooves which extend along a preset direction; the battery cores are sequentially abutted between at least one pair of first longitudinal beams; the end parts of the battery core, which extend towards at least one pair of first longitudinal beams, are respectively provided with two polar posts, and the two polar posts are respectively embedded in the first clamping grooves of the at least one pair of first longitudinal beams and are in sliding connection with the first clamping grooves; the poles at the same end of the adjacent cells are opposite in polarity; the connecting assemblies are arranged on the end surfaces, far away from the bottom shell, of at least one pair of first longitudinal beams; two ends of the plurality of connecting components extending along the preset direction are respectively detachably connected with the polar posts with different polarities of the adjacent battery cores; the preset direction is the horizontal length extending direction or the horizontal width extending direction of the bottom shell. The battery cells can be freely combined to replace integral welding.

Description

Novel CTP battery pack

Technical Field

The utility model relates to the technical field of new energy batteries, in particular to a novel CTP battery pack.

Background

Currently, as the pressure of resources and environments continues to increase, new energy automobiles represented by electric automobiles become an important direction of development of automobile industry, and electric automobiles gradually open markets and enter people's lives. The electric vehicle is widely accepted by society due to the characteristics of energy conservation and environmental protection, and the power battery is used as an energy source of the electric vehicle to directly influence the dynamic property, reliability, safety and economy of the vehicle. In order To save space in a vehicle and improve the energy density of a battery Pack, many enterprises adopt CTP structures, namely, a Cell To Pack is directly used for obtaining the battery Pack structure by using battery cells, and a common assembly mode is To weld aluminum bar structures on positive electrode posts and negative electrode posts of a plurality of square battery cells connected in series or in parallel respectively by using laser, and then fix each battery Cell with a bottom shell, so that each battery Cell, the bottom shell and the bar form a whole; this assembly has the following disadvantages: once the performance of a certain battery cell is inconsistent with that of other battery cells, the battery cells cannot be conveniently removed, and the whole battery cells are separated from the bottom shell and the tabs, so that the separation difficulty is extremely high, the whole battery pack is easily scrapped, and serious resource waste is caused.

The chinese patent application with publication number CN114024084a discloses a battery pack fixing structure, which is to set up a first clamping groove from the bottom of the battery core and corresponding clamping blocks on the bottom shell, and detachably connect the battery core with the bottom shell through fasteners, but the scheme does not relate to how to connect the pole sides of the battery core, if the conventional aluminum tabs are still used for welding and assembling, a larger separation difficulty still occurs. Therefore, it is highly desirable to provide a CTP battery pack with a detachable assembly between adjacent cells, which reduces the difficulty of separating the cells.

Disclosure of Invention

In view of this, the present utility model provides a novel CTP battery pack in which the cell post and the bottom case can be conveniently separated.

The technical scheme of the utility model is realized as follows: the utility model provides a novel CTP battery pack, which comprises

A hollow bottom shell;

at least one pair of first longitudinal beams are arranged on two opposite side surfaces of the bottom shell at intervals; the adjacent end surfaces of the at least one pair of first longitudinal beams are provided with first clamping grooves which extend along a preset direction;

the battery cores are sequentially abutted between at least one pair of first longitudinal beams; the end parts of each battery cell extending towards the at least one pair of first longitudinal beams are respectively provided with two polar posts, and the two polar posts are respectively embedded in the first clamping grooves of the at least one pair of first longitudinal beams and are in sliding connection with the first clamping grooves; the poles at the same end of the adjacent cells are opposite in polarity;

the connecting assemblies are arranged on the end surfaces, far away from the bottom shell, of at least one pair of first longitudinal beams; the two ends of the plurality of connecting components extending along the preset direction are respectively detachably connected with the polar posts with different polarities of the adjacent battery cells; the preset direction is a horizontal length extending direction or a horizontal width extending direction of the bottom shell.

On the basis of the technical scheme, preferably, the end faces, far away from the bottom shell, of the at least one pair of first longitudinal beams are provided with a plurality of first through holes, the plurality of first through holes are arranged at intervals along a preset direction, extend towards the bottom shell direction and are communicated with the first clamping grooves; the pole posts of the plurality of electric cores are correspondingly provided with second through holes; the plurality of connecting components are respectively arranged in two adjacent first through holes of the same first longitudinal beam and second through holes of polar posts with different polarities of the adjacent battery cells in a penetrating mode.

Preferably, each of the plurality of connection assemblies includes a base plate and a first fastener; the base plate and the end face of the first longitudinal beam, which is far away from the bottom shell, are propped against each other, first fasteners are respectively arranged at two ends of the base plate, which extend along the preset direction, and pass through the first through holes and the second through holes and are in fastening connection with the first longitudinal beam and the polar column.

Further preferably, the projections of the polar posts at the same end of the two adjacent electric cores on the end face of the first longitudinal beam far away from the bottom shell are all located in the area where the base plate is located.

Still further preferably, the end edges of the at least one pair of first stringers, which are far away from the bottom shell, are provided with first openings, and the first openings extend towards the bottom shell direction and are communicated with the first clamping grooves; the width dimension of the pole along the preset direction is matched with the width dimension of the first opening along the preset direction.

Still more preferably, the terminal posts at two ends of each electric core are staggered in the axial extending direction of the first opening.

Still more preferably, at least one second stringer is also included; the at least one second longitudinal beam is arranged between the at least one pair of first longitudinal beams and is arranged at intervals with the at least one pair of first longitudinal beams, a second clamping groove is formed in the end face, close to the first longitudinal beam, of the second longitudinal beam, and the second clamping groove extends along the preset direction and penetrates through the surfaces of two opposite sides of the second longitudinal beam; each battery cell is respectively propped against the end surfaces of the first longitudinal beam and the second longitudinal beam along the extending direction of the first clamping groove, and the polar posts at the two ends of each battery cell are respectively arranged in the first clamping groove and the second clamping groove in a sliding way; the polarities of the poles of the two battery cells adjacently arranged along the axial direction of the second clamping groove are opposite and are overlapped.

Still further preferably, a second opening is provided on an end surface of the at least one second longitudinal beam away from the bottom shell, the second opening extends toward the bottom shell direction and is communicated with the second clamping groove, and a width dimension of the second opening along the preset direction is identical to a width dimension of the first opening along the preset direction.

Further preferably, a plurality of second fasteners are further arranged on the at least one second longitudinal beam; the end face, far away from the bottom shell, of the at least one second longitudinal beam is provided with a plurality of third through holes, the third through holes are arranged at intervals along a preset direction and are coaxially arranged with the second through holes on the pole column extending into the second clamping groove, and the second fastener also penetrates through the third through holes and the second through holes and is in fastening connection with the pole column and the at least one second longitudinal beam.

Further preferably, the radial dimension of the second clamping groove is twice the radial dimension of the pole along the second clamping groove.

Compared with the prior art, the novel CTP battery pack provided by the utility model has the following beneficial effects:

(1) The connecting assembly is used for fixing the positions and electrically connecting all the electric cores which are arranged on at least one pair of first longitudinal beams in a sliding manner, so that the serial connection between the adjacent electric cores is realized, all the electric cores are independently connected with the pair of first longitudinal beams, the installation and the disassembly are convenient, the maintainability of the battery pack is improved, the disassembled electric cores are convenient for overhauling and maintenance, and the normal electric cores can be recycled;

(2) The polar posts with different polarities of the same battery cell are in a side-out mode and are staggered in height, so that a plurality of battery cells can be connected in series in sequence in the axial direction of the second clamping groove; the capacity and the output voltage level of the battery pack are further improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a novel CTP battery pack of the present utility model;

FIG. 2 is an exploded perspective view of a novel CTP battery pack of the present utility model;

FIG. 3 is a perspective view showing the combination of a first stringer and a second stringer of a novel CTP battery pack of the present utility model;

fig. 4 is a top view showing a combination state of a first longitudinal beam and a second longitudinal beam of the novel CTP battery pack according to the present utility model;

FIG. 5 is a cross-sectional view taken along the direction A-A and B-B of FIG. 4;

FIG. 6 is a perspective view and a front view of the electrical core of a novel CTP battery pack of the present utility model;

FIG. 7 is a perspective view and a front view of a connection assembly of a novel CTP battery pack of the present utility model;

fig. 8 is a perspective view of a base plate and a first connector of a connection assembly of a novel CTP battery pack of the present utility model.

Reference numerals: 1. a bottom case; 2. a first stringer; 3. a battery cell; 4. a connection assembly; 100. a first clamping groove; 200. a pole; 300. a first through hole; 400. a second through hole; 41. a substrate; 42. a first fastener; 500. a first opening; 5. a second stringer; 600. a second clamping groove; 700. a second opening; 51. a second fastener; 800. and a third through hole.

Detailed Description

The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

As shown in fig. 1-6, the utility model provides a novel CTP battery pack, which comprises a bottom shell 1, at least one pair of first longitudinal beams 2, a plurality of electric cores 3, a plurality of connecting components 4 and the like; wherein:

the bottom shell 1 is hollow; the inner space of the bottom shell 1 is used for accommodating at least one pair of first longitudinal beams 2 and a plurality of battery cells 3.

At least one pair of first longitudinal beams 2 are arranged on two opposite side surfaces of the bottom shell 1 at intervals; the adjacent end surfaces of at least one pair of first longitudinal beams 2 are provided with first clamping grooves 100, and the first clamping grooves 100 are arranged in an extending mode along a preset direction; the preset direction here is the horizontal length extending direction or the horizontal width extending direction of the bottom case 1, and the same applies below. The space between the two oppositely arranged first stringers 2 becomes the space in which several cells are placed side by side. To avoid short-circuiting the first stringers 2 may be made of an insulating material, such as an SMC composite material, which not only has sufficient strength but also contributes to a reduction in the overall weight of the battery pack. The first stringers 2 shown in the figures are arranged parallel to each other.

The electric cores 3 are sequentially abutted between at least one pair of first longitudinal beams 2, the electric cores 3 shown in fig. 1 and 2 are mutually abutted and sequentially arranged, the polarities of the end parts of the adjacent electric cores are different, specifically, two polar posts 200 are respectively arranged at the end parts of each electric core 3 extending towards at least one pair of first longitudinal beams 2, and the two polar posts 200 are respectively embedded in the first clamping grooves 100 of at least one pair of first longitudinal beams 2 and are in sliding connection with the first clamping grooves 100; the poles 200 at the same end of adjacent cells 3 are opposite in polarity. One end of the illustrated battery core is a positive electrode, a polar column close to the end is a positive polar column, the other end is a negative polar column, and the polar columns at the same end of the adjacent battery core are alternately arranged.

A plurality of connecting assemblies 4 are arranged on the end surfaces of at least one pair of first longitudinal beams 2 far away from the bottom shell 1; the two ends of the plurality of connection assemblies 4 extending along the preset direction are detachably connected with the polar posts 200 with different polarities of the adjacent battery cells 3 respectively. The connecting component 4 is used for electrically connecting two polar posts 200 with different polarities at the same end of two adjacent electric cores 3, so as to realize the serial connection function of each electric core. The connecting component 4 adopts a detachable structure, so that the existing aluminum bar welding process is replaced, the installation and the disassembly are convenient, and the defects of poor welding and difficult disassembly caused by welding can be avoided.

As shown in fig. 7 and 8, in order to realize detachable connection between the connection assembly 4 and the pole and the first stringers 2, a plurality of first through holes 300 are provided on the end surfaces of at least one pair of first stringers 2 far from the bottom shell 1, the plurality of first through holes 300 are arranged at intervals along a preset direction, and the plurality of first through holes 300 also extend towards the bottom shell 1 and are mutually communicated with the first clamping groove 100; the pole posts 200 of the plurality of battery cells 3 are correspondingly provided with second through holes 400; the plurality of connection assemblies 4 are respectively arranged in two adjacent first through holes 300 of the same first longitudinal beam 2 and second through holes 400 of the poles 200 with different polarities of the adjacent battery cells 3 in a penetrating mode. As shown in the figure, the connection component 4 extends into the first through hole 300 and the second through hole 400 respectively, and electrically connects the poles with different polarities at the same end of the adjacent cells.

Specifically, the plurality of connection assemblies 4 each include a base plate 41 and a first fastener 42; the base plate 41 abuts against the end face, away from the bottom shell 1, of the first longitudinal beam 2, first fasteners 42 are respectively arranged at two ends, extending along the preset direction, of the base plate 41, and the first fasteners 42 penetrate through the first through holes 300 and the second through holes 400 and are in fastening connection with the first longitudinal beam 2 and the pole 200. In this embodiment, the base plate 41 is a flat plate structure, and two ends of the base plate 41 are provided with through limiting holes, and the limiting holes are used for allowing the first fastening piece 42 to pass through and be fastened and connected with the first longitudinal beam 2 and the polar column. The outer surface of the first fastener 42 may be provided with external threads and the first through hole 300 or the second through hole 400 may be provided with internal threads. The connection assembly 4 is made of a conductive material.

As shown in fig. 7 and 8, the projections of the posts 200 at the same end of two adjacent battery cells 3 on the end surface of the first longitudinal beam 2 far from the bottom shell 1 are all located in the area where the substrate 41 is located, that is, the width dimension of the posts 200 along the preset direction is smaller than the width dimension of the plurality of battery cells 3 along the preset direction. In order to avoid accidental short circuit caused by collision contact between adjacent poles, the width dimension of the poles in the preset direction can be limited to enable gaps to exist between the poles at the same end of the adjacent cells, and the spacing between the second through holes 400 on the poles of the adjacent cells is adapted to the spacing between the limit holes at the two ends of the substrate 41.

As shown in fig. 2, 3, 4 and 5, for more convenience, the battery cell 3 is placed between at least one pair of first stringers 2, and first openings 500 are provided on the end edges of at least one pair of first stringers 2 away from the bottom shell 1, and the first openings 500 extend toward the bottom shell 1 and are provided to penetrate through the first clamping grooves 100; the width of the post 200 along the predetermined direction is adapted to the width of the first opening 500 along the predetermined direction. The pole posts 200 at two ends of each battery core 3 can vertically pass through the first openings 500 at the end parts of each first longitudinal beam 2, so as to enter the first clamping groove 100, further slide to the position to be assembled along the extending direction of the first clamping groove 100 and face the first through holes 300 on the first longitudinal beams 2 at the position, and improve the installation efficiency of the connecting assembly 4. As a further improvement, in order to distinguish the polarities of the poles of the different cells, the poles 200 at the two ends of each cell 3 are prevented from being staggered in the axial extending direction of the first opening 500. As shown in fig. 6, the heights of the positive electrode posts and the negative electrode posts at the two ends of each cell can be different, so that the polarity of the ends of the adjacent cells can be conveniently identified, and reverse installation is prevented.

The application method of the utility model comprises the following steps: at least one pair of first longitudinal beams 2 are placed in the bottom shell 1 in advance, and the end surfaces of the at least one pair of first longitudinal beams 2, provided with first clamping grooves, are oppositely arranged; placing each battery cell from a first opening on the same side of at least one pair of first longitudinal beams 2, so that the end surface of each battery cell is abutted against the inner surface of the bottom shell or the adjacent end surfaces of the two first longitudinal beams 2; the poles with different polarities at the two ends of each battery core slide in different first clamping grooves and reach preset positions respectively, then the connecting assembly 4 is used for fastening and connecting the same ends of two adjacent battery cores with different first longitudinal beams 2, the positive pole of the battery core at the head end is not electrically connected with the connecting assembly 4, but is used as the total positive output end of the battery pack, the negative pole of the battery core at the tail end is not electrically connected with the connecting assembly 4, but is used as the total negative output end of the battery pack, and the bottom shell is sealed. The battery pack with the structure has only one row of battery cells.

As a special case of the utility model, as shown in the drawings of the description, the solution also comprises at least one second stringer 5; at least one second longitudinal beam 5 is arranged in a region between at least one pair of first longitudinal beams 2 and is arranged at intervals with the at least one pair of first longitudinal beams 2, a second clamping groove 600 is formed in the end face, close to the first longitudinal beam 2, of the second longitudinal beam 5, and the second clamping groove 600 extends along a preset direction and penetrates through two opposite side surfaces of the second longitudinal beam 5; each battery cell 3 is respectively abutted against the end surfaces of the first longitudinal beam 2 and the second longitudinal beam 5 adjacent to each other along the extending direction of the first clamping groove 100, and the polar posts 200 at the two ends of each battery cell 3 are respectively arranged in the first clamping groove 100 and the second clamping groove 600 in a sliding way; the poles 200 of the two cells 3 disposed adjacently along the axial direction of the second card slot 600 are opposite in polarity and are stacked. In this embodiment, the cells are not abutted against the pair of first stringers 2, but are disposed between the first stringers 2 and the second stringers 5, and the two cells disposed between the pair of first stringers 2 are also disposed in series, i.e., adjacent poles of the two cells disposed between the pair of first stringers 2 are disposed in the second clamping groove 600 in a stacked manner, and second through holes in poles of different polarities at adjacent ends of the two cells are disposed to be mutually penetrated.

The battery pack shown in fig. 2 has two rows of cells, and the cells located at the same position in different rows between the two first stringers 2 are sequentially arranged in series. Of course, more second stringers may be further provided, a new further added row of electric cores arranged along the preset direction are abutted against the end surfaces of the two adjacent second stringers 5, and two poles of the electric cores of the new added row are respectively inserted into the second clamping grooves of the two adjacent second stringers 5, and are mutually stacked with the poles of the electric cores of the corresponding positions of the adjacent rows, which is not described herein again.

Similarly, in order to facilitate the placement of the battery cells between the second longitudinal beam 5 and the first longitudinal beam 2, a second opening 700 is provided on the end surface of at least one second longitudinal beam 5 away from the bottom shell 1, the second opening 700 extends toward the bottom shell 1 and penetrates through the second clamping groove 600, and the width dimension of the second opening 700 along the preset direction is identical to the width dimension of the first opening 500 along the preset direction. The second opening 700 is positioned and sized substantially similar to the first opening 500, and is also provided to allow the two terminals of the end portion of the battery cell to be smoothly placed into the first and second clamping grooves and slid into place.

As shown in fig. 2, in order to fix two adjacent poles of different polarities on the second longitudinal beams, a plurality of second fasteners 51 are similarly provided on at least one second longitudinal beam 5; the end face, far away from the bottom shell 1, of at least one second longitudinal beam 5 is provided with a plurality of third through holes 800, and the third through holes 800 are arranged at intervals along a preset direction and are coaxially arranged with the second through holes 400 on the pole 200 extending into the second clamping groove 600, and the second fastening piece 51 is further arranged in the third through holes 800 and the second through holes 400 in a penetrating mode and is in fastening connection with the pole 200 and the at least one second longitudinal beam 5. The second fastener 51 is substantially identical in structure to the first fastener 42.

In order to prevent the polar posts from radial play in the second clamping groove, the radial dimension of the second clamping groove 600 is twice that of the polar post 200 along the radial dimension of the second clamping groove 600, that is, the radial height of the polar posts with different polarities of two adjacent electric cores after being laminated is basically consistent with the radial dimension of the second clamping groove. Similarly, the first and second card slots 600 have substantially the same radial dimension.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A novel CTP battery pack is characterized by comprising

A hollow bottom shell (1);

at least one pair of first longitudinal beams (2) which are arranged on two opposite side surfaces of the bottom shell (1) at intervals; the adjacent end surfaces of the at least one pair of first longitudinal beams (2) are respectively provided with a first clamping groove (100), and the first clamping grooves (100) are arranged in an extending mode along a preset direction;

the battery cores (3) are sequentially abutted between at least one pair of first longitudinal beams (2); two polar posts (200) are respectively arranged at the end parts of each electric core (3) extending towards the at least one pair of first longitudinal beams (2), and the two polar posts (200) are respectively embedded in the first clamping grooves (100) of the at least one pair of first longitudinal beams (2) and are in sliding connection with the first clamping grooves (100); the polarities of the poles (200) positioned at the same end of the adjacent battery cells (3) are opposite;

the connecting assemblies (4) are arranged on the end surfaces of at least one pair of first longitudinal beams (2) far away from the bottom shell (1); two ends of the plurality of connecting components (4) extending along the preset direction are respectively detachably connected with the polar posts (200) with different polarities of the adjacent battery cells (3); the preset direction is the horizontal length extending direction or the horizontal width extending direction of the bottom shell (1).

2. The novel CTP battery pack according to claim 1, wherein the end surfaces of the at least one pair of first stringers (2) far from the bottom shell (1) are each provided with a plurality of first through holes (300), the plurality of first through holes (300) are arranged at intervals along a preset direction, and the plurality of first through holes (300) also extend towards the bottom shell (1) and are mutually communicated with the first clamping groove (100); the pole posts (200) of the plurality of electric cores (3) are correspondingly provided with second through holes (400); the plurality of connecting assemblies (4) are respectively arranged in two first through holes (300) adjacent to the same first longitudinal beam (2) and second through holes (400) of polar posts (200) with different polarities of adjacent electric cores (3) in a penetrating mode.

3. The novel CTP battery pack according to claim 2, wherein each of said plurality of connection assemblies (4) comprises a base plate (41) and a first fastener (42); the base plate (41) and the end face of the first longitudinal beam (2) away from the bottom shell (1) are propped against each other, first fasteners (42) are respectively arranged at two ends of the base plate (41) extending along the preset direction, and the first fasteners (42) penetrate through the first through holes (300) and the second through holes (400) and are in fastening connection with the first longitudinal beam (2) and the pole column (200).

4. The novel CTP battery pack according to claim 3, wherein projections of the posts (200) at the same end of the two adjacent electric cores (3) on the end face of the first longitudinal beam (2) far away from the bottom shell (1) are all located in the area where the substrate (41) is located.

5. The novel CTP battery pack according to claim 4, wherein the end edges of the at least one pair of first stringers (2) far from the bottom shell (1) are each provided with a first opening (500), and the first openings (500) extend toward the bottom shell (1) and are arranged to penetrate through the first clamping grooves (100); the width dimension of the pole (200) along the preset direction is matched with the width dimension of the first opening (500) along the preset direction.

6. The novel CTP battery pack according to claim 5, wherein the poles (200) at both ends of each cell (3) are staggered in the axial extension direction of the first opening (500).

7. The novel CTP battery pack according to claim 6, further comprising at least one second stringer (5); the at least one second longitudinal beam (5) is arranged between the at least one pair of first longitudinal beams (2) and is arranged at intervals with the at least one pair of first longitudinal beams (2), a second clamping groove (600) is formed in the end face, close to the first longitudinal beams (2), of the second longitudinal beam (5), and the second clamping groove (600) extends along a preset direction and penetrates through two opposite side surfaces of the second longitudinal beam (5); each electric core (3) is respectively propped against the end surfaces of the first longitudinal beam (2) and the second longitudinal beam (5) along the extending direction of the first clamping groove (100), and the polar posts (200) at the two ends of each electric core (3) are respectively arranged in the first clamping groove (100) and the second clamping groove (600) in a sliding way; the polarities of the poles (200) of the two battery cells (3) which are adjacently arranged along the axial direction of the second clamping groove (600) are opposite and are arranged in a laminated way.

8. The novel CTP battery pack according to claim 7, wherein the at least one second longitudinal beam (5) is provided with a second opening (700) on the end surface far away from the bottom shell (1), the second opening (700) extends towards the bottom shell (1) and is communicated with the second clamping groove (600), and the width dimension of the second opening (700) along the preset direction is identical to the width dimension of the first opening (500) along the preset direction.

9. The novel CTP battery pack according to claim 8, wherein said at least one second stringer (5) further provided with a plurality of second fasteners (51); a plurality of third through holes (800) are formed in the end face, far away from the bottom shell (1), of the at least one second longitudinal beam (5), the third through holes (800) are arranged at intervals along the preset direction and are coaxial with the second through holes (400) in the polar columns (200) extending into the second clamping grooves (600), and the second fasteners (51) are further arranged in the third through holes (800) and the second through holes (400) in a penetrating mode and are fixedly connected with the polar columns (200) and the at least one second longitudinal beam (5).

10. The novel CTP battery pack according to claim 7, wherein the second clamping groove (600) has a size twice as large as the size of the polar column (200) along the radial direction of the second clamping groove (600).