CN217956007U

CN217956007U - CTP battery pack

Info

Publication number: CN217956007U
Application number: CN202222119960.2U
Authority: CN
Inventors: 程胜兵; 罗懿; 李博一; 王韬
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-12-02
Anticipated expiration: 2032-08-12

Abstract

The utility model provides a CTP battery pack, including box, a plurality of cylinder electricity core and tie-beam, the cylinder electricity core is located the box, and is distributed side by side, the cylinder electricity core includes storage body and utmost point post, and utmost point post setting is on storage body, the quantity of utmost point post is two, and two utmost point posts are with the cross section symmetric distribution at storage body center, and the tie-beam setting is in the box, the quantity of tie-beam is two, two tie-beams respectively with two utmost point post one-to-one electric connection; the cylindrical battery cell is adopted to perform grouping work of the CTP battery pack, compared with a square battery cell, the cylindrical battery cell has better heat dissipation performance, the risk of thermal runaway occurring in the CTP battery pack can be effectively reduced, the structural size of the CTP battery is reduced, and the design cost of the CTP battery is also reduced; design into two utmost point post forms with cylinder electricity core, solved among the prior art cylinder electricity core and can't carry out the technical problem that CTP battery package was worked in groups.

Description

CTP battery pack

Technical Field

The utility model relates to a power battery technical field especially relates to a CTP battery package.

Background

The power battery is a power source of an electric vehicle, and two common power battery structures on the market at present are an MTP structure and a CTP structure respectively, wherein the MTP structure adopts a battery cell-module-battery pack grouping form, and the CTP structure adopts a battery cell-battery pack grouping form.

Chinese patent CN216793876U discloses a CTP square-shell battery cell module mounting structure, which comprises a rectangular box body, wherein the box body comprises at least one beam, and the battery cells are directly arranged in groups in the box body from the beam; the two fixed blocks are respectively and fixedly arranged at the front end and the rear end of one side of the box body far away from the cross beam; and the end plate is inserted into the battery cell and between the fixed blocks so as to fix the battery cell module in the box body, compared with the existing CTP square shell scheme, the CTP square shell battery cell structure reduces the assembly steps, is convenient to assemble, improves the production efficiency, and simultaneously only uses one end plate for the module, thereby not only reducing the material cost, but also having lower requirements on the position precision of a box body beam.

However, in the actual production process, the CTP battery structure has the following technical problems: because the square shell batteries in the CTP battery are mutually attached, in order to avoid thermal runaway in the CTP battery, an operator needs to arrange a partition plate for heat insulation and heat dissipation on the attachment surface of the square shell battery, so that the structural size of the CTP battery is increased, and the design cost of the CTP battery is also increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a CTP battery package can effectively reduce the risk that takes place thermal runaway in the CTP battery package, has not only reduced the structure size of CTP battery, but also has reduced the design cost of CTP battery.

The technical scheme of the utility model is realized like this: the utility model provides a CTP battery package, the power distribution box comprises a box body, the box is hollow structure, still includes a plurality of cylinder electricity cores and tie-beam, and cylinder electricity core is located the box, and is and distribute side by side, cylinder electricity core is including holding electric body and utmost point post, and utmost point post setting is on holding electric body, the quantity of utmost point post is two, and two utmost point posts are with the cross section symmetric distribution at electric body center, and the tie-beam sets up in the box along the direction side by side of cylinder electricity core, the quantity of tie-beam is two, two tie-beams respectively with two utmost point post one-to-one electric connection on every cylinder electricity core.

On the basis of the above technical scheme, preferably, the pole on the cylindrical battery cell is of a square structure.

On above technical scheme's basis, preferred, the tie-beam includes convergent flow layer, insulating layer and articulamentum, and utmost point post electric connection on convergent flow layer and the cylinder electricity core, the insulating layer setting is between convergent flow layer and articulamentum, the articulamentum and the inner wall fixed connection of box.

Further preferably, the connecting beam further comprises a hot melting table, the hot melting table is arranged on the confluence layer, the pole is provided with a through hole, and the through hole is connected with the hot melting table in a matched manner.

On the basis of above technical scheme, it is preferred, the box includes end plate, curb plate and bottom plate, and the quantity of end plate is two, and two end plates use the cross section symmetric distribution at cylinder electricity core center at the both ends of cylinder electricity core, and the quantity of curb plate is two, and the both sides of end plate are connected respectively to two curb plates to constitute square structure with two end plate combinations, the tie-beam setting is on the bottom plate, the bottom plate simultaneously with end plate and curb plate fixed connection.

Still further preferably, there is a fitting gap between the end plate and the connecting beam.

Still further preferably, the side plates are attached to the connecting beam.

The utility model discloses a CTP battery package has following beneficial effect for prior art:

(1) The cylindrical battery cell is adopted for grouping the CTP battery packs, compared with a square battery cell, the cylindrical battery cell has better heat dissipation performance, the risk of thermal runaway in the CTP battery pack can be effectively reduced, the structural size of the CTP battery is reduced, and the design cost of the CTP battery is also reduced;

(2) Design into two utmost point post forms with cylinder electricity core, changed the technical structure of traditional cylinder electricity core, solved among the prior art cylinder electricity core and can't carry out the technical problem that CTP battery package was in groups worked.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a CTP battery pack of the present invention;

fig. 2 is a schematic diagram of a part of the structure of the CTP battery pack of the present invention;

fig. 3 is a schematic structural diagram of a cylindrical battery cell of the present invention;

fig. 4 is a schematic structural view of the connection beam of the present invention.

In the figure: 1. a box body; 11. an end plate; 12. a side plate; 13. a base plate; 101. assembling gaps; 2. a cylindrical cell; 21. an electricity storage body; 22. a pole column; 201. a through hole; 3. a connecting beam; 31. a sink layer; 32. an insulating layer; 33. a connecting layer; 34. and (4) a hot melting table.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 1-4, the CTP battery pack of the present invention comprises a case 1, a plurality of cylindrical cells 2 and a connecting beam 3.

Box 1 is as the shell of CTP battery package, box 1 is hollow structure, and is specific, and box 1 includes end plate 11, curb plate 12 and bottom plate 13, the quantity of end plate 11 is two, and two end plate 11 use the cross section symmetric distribution at cylinder electricity core 2 center at the both ends of cylinder electricity core 2, the quantity of curb plate 12 is two, and the both sides of end plate 11 are connected respectively to two curb plates 12 to constitute square structure with two end plate 11 combinations, tie-beam 3 sets up on bottom plate 13, bottom plate 13 simultaneously with end plate 11 and curb plate 12 fixed connection.

In order to reduce the structural size of the CTP battery as much as possible, an assembly gap 101 is formed between the end plate 11 and the connecting beam 3, and the side plate 12 is attached to the connecting beam 3, where the purpose of the assembly gap 101 is to facilitate an operator to electrically connect the post 22 on the cylindrical battery core 2 with the connecting beam 3, and specifically, the width of the assembly gap 101 is 1-3 mm.

Cylinder electricity core 2 is as the main part of CTP battery package, cylinder electricity core 2 is located box 1, and is and distribute side by side, cylinder electricity core 2 is including storing electric body 21 and utmost point post 22, and utmost point post 22 sets up on storing electric body 21, the quantity of utmost point post 22 is two, and two utmost point posts 22 are in order to store the cross section symmetric distribution at electric body 21 center, and is concrete, utmost point post 22 is square structure, compares in other structures, and square structure's utmost point post 22 is great with tie-beam 3's area of contact, can effectively prevent utmost point post 22 and tie-beam 3 virtual joint.

Here design into two utmost point post 22 forms with cylinder electricity core 2, solved among the prior art cylinder electricity core 2 and can't carry out the technical problem that CTP battery package worked in groups, compare in square electricity core, cylinder electricity core 2's heat dispersion is better, can reduce the risk that takes place thermal runaway in the CTP battery package, has not only reduced the structure size of CTP battery, but also has reduced the design cost of CTP battery.

The tie-beam 3 supplies a plurality of cylinder electricity core 2 to carry out electric connection, the tie-beam 3 sets up in box 1 along cylinder electricity core 2's the direction side by side, and the quantity of tie-beam 3 is two, two tie-beams 3 respectively with every cylinder electricity core 2 on two utmost point post 22 one-to-one electric connection, here the highly external diameter that depends on cylinder electricity core 2 of tie-beam 3, specific, the highly half of cylinder electricity core 2 external diameter that is of tie-beam 3.

The tie-beam 3 includes conflux layer 31, insulating layer 32 and articulamentum 33, and the utmost point post 22 electric connection on conflux layer 31 and the cylinder electricity core 2, insulating layer 32 set up between conflux layer 31 and articulamentum 33, and the inner wall fixed connection of articulamentum 33 and box 1 is specific, the tie-beam 3 adopts injection moulding technology to make, and in the injection moulding process, operating personnel will conflux layer 31 and articulamentum 33 pre-buried in insulating layer 32, and here conflux layer 31 is for overflowing the copper bar, and articulamentum 33 is the metal reinforcing plate.

In order to prevent utmost point post 22 from taking place the skew on tie-beam 3, guarantee the electric connection performance between utmost point post 22 and the tie-beam 3, it is concrete, tie-beam 3 still includes hot melt platform 34, and hot melt platform 34 sets up on layer 31 converges, seted up through-hole 201 on utmost point post 22, through-hole 201 is connected with hot melt platform 34 cooperation, and is concrete, through-hole 201 is the circular port, and hot melt platform 34 is circular structure.

When the pole fixing device is used, an operator firstly enables the through hole 201 in the pole 22 to be matched and connected with the hot melting table 34 on the connecting beam 3, then the end face of the hot melting table 34 is processed by the heating element, the end face of the hot melting table 34 is deformed, and the pole 22 is pressed on the connecting beam 3.

The working principle is as follows: as shown in fig. 1 to 4, an operator first places the connection beam 3 on the bottom plate 13 of the box body 1, reserves an assembly gap 101 between the connection beam 3 and the end plate 11, then fixes the connection layer 33 on the connection beam 3 and the bottom plate 13 by using a welding process, and finally places the pole 22 of the cylindrical battery core 2 on the bus layer 31 of the connection beam 3, wherein the pole 22 is electrically connected with the bus layer 31.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The CTP battery pack comprises a box body (1), wherein the box body (1) is of a hollow structure;

the method is characterized in that: also comprises a plurality of cylindrical battery cores (2) and connecting beams (3), wherein,

the cylindrical battery cell (2) is positioned in the box body (1) and distributed side by side, the cylindrical battery cell (2) comprises an electricity storage body (21) and two pole columns (22), the pole columns (22) are arranged on the electricity storage body (21), and the two pole columns (22) are symmetrically distributed on the cross section of the center of the electricity storage body (21);

the connecting beams (3) are arranged in the box body (1) along the parallel direction of the cylindrical battery cores (2), the number of the connecting beams (3) is two, and the two connecting beams (3) are respectively electrically connected with the two pole columns (22) on each cylindrical battery core (2) in a one-to-one correspondence manner.

2. The CTP battery package of claim 1, wherein: the pole (22) on the cylindrical battery cell (2) is of a square structure.

3. The CTP battery package of claim 1, wherein: the connecting beam (3) comprises a bus layer (31), an insulating layer (32) and a connecting layer (33), wherein,

the bus layer (31) is electrically connected with the pole (22) on the cylindrical battery core (2);

an insulating layer (32) is provided between the bus layer (31) and the connection layer (33);

the connecting layer (33) is fixedly connected with the inner wall of the box body (1).

4. The CTP battery package of claim 3, wherein: the connecting beam (3) further comprises a hot melting table (34), the hot melting table (34) is arranged on the confluence layer (31), a through hole (201) is formed in the pole (22), and the through hole (201) is connected with the hot melting table (34) in a matched mode.

5. The CTP battery package of claim 1, wherein: the box body (1) comprises an end plate (11), a side plate (12) and a bottom plate (13),

the number of the end plates (11) is two, and the two end plates (11) are symmetrically distributed at two ends of the cylindrical battery cell (2) by the transverse cutting plane of the center of the cylindrical battery cell (2);

the number of the side plates (12) is two, and the two side plates (12) are respectively connected with the two sides of the end plate (11) and combined with the two end plates (11) to form a square structure;

the connecting beam (3) is arranged on the bottom plate (13), and the bottom plate (13) is fixedly connected with the end plate (11) and the side plate (12) at the same time.

6. The CTP battery package of claim 5, wherein: an assembly gap (101) exists between the end plate (11) and the connecting beam (3).

7. The CTP battery package of claim 5, wherein: the side plates (12) are attached to the connecting beam (3).