CN116111269A - CTP battery pack - Google Patents

Abstract

The invention relates to the technical field of new energy vehicles, in particular to a CTP battery pack, which includes: a bottom carrying unit, a battery cell unit, a battery cell pressing plate and a battery cell flow guide. A plurality of cell units are detachably fixed on the upper end of the bottom carrying unit; the positive and negative poles of the cell unit are set at the upper end of the cell unit; the cell pressing plate is set on the bottom carrying unit; A penetrating avoidance groove; the cell deflector is arranged in the avoidance groove, and the cell deflector is used for connecting the cells in series or in parallel. In this CTP battery pack, since the positive and negative poles of the battery cells are located on the upper part, the flow guides between adjacent cells are also on the upper part, which effectively solves the problem caused by the positive and negative poles of the current battery cells on both sides. The bottom deflector cannot be damaged, so that it is inconvenient to take out a single battery cell.

Description

A CTP battery pack

technical field

The invention relates to the technical field of new energy vehicles, in particular to a CTP battery pack.

Background technique

CTP (Cell to Pack, no module power battery pack), the CTP battery pack composed of cylindrical cells for new energy vehicles is composed of hundreds of cells connected in series and parallel. After retrieval, the positive and negative poles of the cells in the CTP battery packs used in the prior art are located on different sides. For example, Chinese patent CN216563344U discloses a CTP battery pack. The battery strings in the CTP battery pack (equivalent to the ) The upper end is connected and fixed through an upper limiter (equivalent to an upper deflector), and the lower end of the battery string is connected and fixed through a lower limiter (equivalent to a lower deflector). It can be seen that the positive and negative electrodes of the battery pack in this patent are arranged on different sides.

In the existing CTP battery pack, because the positive and negative poles of the cylindrical cells are arranged at both ends, the adjacent cylindrical cells will be connected by deflectors during integration, and when the abnormal cells are replaced during repair, the interconnection structure at the bottom cannot Separation makes it impossible to repair and replace a single battery cell; the battery cells in the whole box can only be taken out as a whole, and the maintenance cost is huge.

Contents of the invention

The invention provides a CTP battery pack aiming at the technical problem in the prior art that the bottom connection structure cannot be separated when the CTP battery pack is repaired, resulting in the inability to repair and replace a single battery cell.

The technical scheme that the present invention solves the problems of the technologies described above is as follows:

A CTP battery pack, comprising: a bottom carrying unit, a cell monomer, a cell pressing plate, and a cell guide;

A plurality of the cell units are arranged on the upper end of the bottom carrying unit;

The positive and negative poles of the battery cell are arranged on the upper end of the battery cell;

The cell pressing plate is detachably fixed on the bottom carrying unit; the cell pressing plate is provided with an avoidance groove that penetrates up and down; the cell current guide is arranged in the avoidance groove, and the cell guide Flow parts are used to connect the battery cells in series or in parallel.

Further: the bottom carrying unit includes: the bottom guard plate of the battery pack, the water cooling plate and the lower box of the battery pack;

The water cooling plate is fixed on the upper end of the bottom guard plate of the battery pack; the lower box of the battery pack is fixed on the upper end of the water cooling plate;

The upper edge of the lower box of the battery pack is fixed with several longitudinally arranged mounting columns, and the upper ends of the mounting columns are fixedly connected with the cell pressure plate;

The cell unit is detachably fixed on the lower case of the battery pack.

Further: the upper end of the mounting column is provided with a threaded blind hole;

A through hole is opened on the cell pressing plate;

The connecting piece passes through the through hole and the threaded blind hole to fixedly connect the cell pressing plate and the mounting column.

Further: the upper end of the lower box of the battery pack is provided with several installation slots;

One cell unit is fastened in each installation slot.

Further: also include: elastic buffer structure;

The installation groove is set as a stepped groove;

An elastic buffer structure is arranged in each of the stepped grooves, and a cell unit is fastened in each of the elastic buffer structures.

Further: the elastic buffer structure is made of rubber;

The outside of the elastic buffer structure is a conical structure matching the stepped groove, and the inside of the elastic buffer structure is a cavity matching the battery cell.

Further: a plurality of the cell monomers are arranged in a matrix;

The number of the avoidance grooves is the same as the number of rows of the battery cells, and a plurality of the avoidance grooves are distributed in parallel.

Further: the material of the bottom guard plate of the battery pack, the water cooling plate, the lower box of the battery pack and the battery cell pressure plate is steel or aluminum.

Further: the material of the cell current guide is steel, aluminum or nickel.

Further: the single battery cell is a cylindrical structure.

The CTP battery pack provided by the present invention has at least the following beneficial effects or advantages:

In the CTP battery pack provided by the present invention, a plurality of cell units are detachably fixed on the upper end of the bottom carrying unit, the positive and negative poles of the cell unit are arranged at the upper end of the cell unit, and the cell pressing plate is detachable The ground is fixed on the bottom bearing unit; the cell pressure plate is provided with an avoidance groove that penetrates up and down; the cell guide is arranged in the avoidance groove, and the cell guide is used for series or parallel connection of the battery cells. The CTP battery pack, since the positive and negative poles of the battery cells are located on the upper part, and the flow guides between adjacent cells are also on the upper part, which effectively solves the current problem caused by the positive and negative poles of the battery cells on both sides. The bottom deflector cannot be damaged, so that it is inconvenient to take out a single battery cell. At the same time, the battery cells are limited and fixed through the detachable connection between the cell pressure plate and the bottom load-carrying unit; the CTP battery pack designed in this way can not only ensure a stable connection, but also when a single cell is abnormal, only It is necessary to cancel the connection between the cell pressure plate and the bottom carrying unit, and then destroy the cell guide on the upper part of the adjacent cell, then the abnormal cell can be taken out, and the new cell can be replaced with the current guide, which can effectively It solves the technical problem in the prior art that when a single battery cell is abnormal and needs to be repaired, the bottom connection structure cannot be separated, resulting in the inability to repair and replace a single battery cell, and improves the maintenance efficiency of the CTP battery pack.

Description of drawings

Fig. 1 is the axonometric view of the CTP battery pack provided by the embodiment of the present invention;

Fig. 2 is a front view of the CTP battery pack provided by the embodiment of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

100-battery pack bottom guard plate, 200-water cooling plate, 300-battery pack lower box, 400-elastic buffer structure, 500-battery cell monomer, 600-battery cell pressure plate, 700-the first battery deflector, 800-the second cell current guide, 301-installation column, 302-threaded blind hole, 303-installation groove, 501-positive pole, 502-negative pole, 601-through hole, 602-avoidance groove.

Detailed ways

The invention provides a CTP battery pack aiming at the technical problem in the prior art that the bottom connection structure cannot be separated when the CTP battery pack is repaired, resulting in the inability to repair and replace a single battery cell.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

An embodiment of the present invention provides a CTP battery pack, as shown in Fig. 1 and Fig. 2 , which mainly includes: a bottom carrying unit, a cell unit 500, a cell pressing plate 600 and a cell current guide. The bottom load-bearing unit is the base structure on which the battery cells 500 are installed, and it needs to meet various requirements such as load-bearing capacity and heat dissipation capacity. A plurality of electric core units are arranged on the upper end of the bottom carrying unit. The cell unit 500 can adopt a cylindrical structure, which is convenient for arrangement and installation; the positive electrode 501 and the negative electrode 502 of the cell unit 500 are located on the upper end of the cell unit 500; the cell pressing plate 600 is detachably fixed on the bottom carrying unit Above, the cell pressing plate 600 is used to fasten a plurality of cell cells 500 on the bottom carrying unit. The cell pressure plate 600 is provided with an avoidance groove 602 that penetrates up and down; the cell current guide (including the first cell current guide 700 and the second cell current guide 800 ) is arranged in the avoidance groove 602, and the cell current guide It is used for connecting battery cells 500 in series or in parallel; the material of the battery guide is steel, aluminum or nickel. In the CTP battery pack provided in this embodiment, since the positive pole 501 and the negative pole 502 of the battery cell 500 are located on the upper part, and the current guides between adjacent battery cells are also on the upper part, the problem of the battery cell 500 can be solved. The positive electrode 501 and the negative electrode 502 on both sides lead to the indestructibility of the flow guide, which leads to the technical problem that the single battery cell 500 is difficult to take out.

Specifically, as shown in FIG. 1 and FIG. 2 , the bottom carrying unit includes: a battery pack bottom guard plate 100 , a water cooling plate 200 and a battery pack lower case 300 . The battery pack bottom guard plate 100 is a metal plate structure made of steel or aluminum, on which structures such as reinforcing ribs can be provided to increase the overall structural strength of the battery pack bottom guard plate 100 . The upper end of the battery pack bottom guard plate 100 is provided with a plurality of installation holes for installing the water cooling plate 200 . The water cooling plate 200 is a plate-like structure made of steel or aluminum, and there is a circulating cooling water channel inside; the water cooling plate 200 is fixed on the upper end of the battery pack bottom guard plate 100, and the fixing method can be selected to use bolts to install the water cooling plate 200 on the battery In the mounting hole on the upper end of the bottom guard plate 100. The upper end of the water-cooled plate 200 is provided with a plurality of installation holes, and the battery pack lower case 300 is fixed on the upper end of the water-cooled plate 200 by bolts to install the battery pack lower case 300 in the upper end of the water-cooled plate 200 in the mounting holes. The lower box body 300 of the battery pack adopts a mechanical structure made of steel or aluminum, and several vertical installation columns 301 are fixed on the upper edge of the lower box body 300 of the battery pack. The upper end of the mounting column 301 is fixedly connected with the cell pressure plate 600; specifically, the upper end of the mounting column 301 is provided with a threaded blind hole 302, the cell pressure plate 600 is provided with a through hole 601, and the connecting piece passes through the through hole 601 and the threaded blind hole 302 The cell pressing plate 600 is fixedly connected to the mounting column 301 . A plurality of battery cell units 500 are detachably arranged on the battery pack lower box body 300, and the plurality of battery cell units 500 are fixed and limited by the limiting structure formed by the fixed connection between the battery cell pressing plate 600 and the battery pack lower box body 300. bit.

The mechanical cooperation relationship between the battery cell unit 500 and the battery pack lower box 300 affects the stability of the battery cell unit 500; A battery cell unit 500 is fastened in the installation groove 303; through the one-to-one corresponding arrangement of the battery unit unit 500 and the installation groove 303, it can be ensured that each battery cell unit 500 is stably arranged on the lower box body 300 of the battery pack, This ensures the reliability of the entire CTP battery pack. In practical applications, since the cell unit 500 is in direct contact with the installation groove 303, affected by factors such as the vibration generated by the vehicle running, the battery cell unit 500 will inevitably rub against the installation groove 303 and cause damage. It also increases the potential safety hazard of the battery cell 500 , and also has a certain impact on the service life of the battery cell 500 . In order to solve this problem, an elastic buffer structure 400 can also be provided, and the installation groove 303 can be set as a stepped groove, and an elastic buffer structure 400 is arranged in each stepped groove, and a cell unit 500 is fastened in each elastic buffer structure 400 The elastic buffer structure 400 is made of rubber, the outside of the elastic buffer structure 400 is a conical structure matching the stepped groove, and the inside of the elastic buffer structure 400 is a cavity matching the cell unit 500 . The elastic buffer structure 400 has a better buffering effect, which can effectively solve the problem that the battery cells 500 are easily scratched.

There are many ways to arrange the battery cells 500. Considering the aesthetics of the arrangement and the convenience of layout in the car, a preferred embodiment provided by the present invention arranges the battery cells 500 in a matrix, avoiding the slots. The number of 602 is the same as the number of rows of battery cells 500 , and a plurality of escape grooves 602 are distributed in parallel. For example, the CTP battery pack uses twelve battery cells 500, and the twelve battery cells 500 are divided into three rows arranged in parallel, with four battery cells 500 arranged in each row, and between two adjacent rows The distance between them and the distance between two adjacent battery cells 500 in each row are the same. At the same time, three avoidance grooves 602 are provided correspondingly, and the battery cell deflectors are arranged in the avoidance grooves 602 , and the battery cells 500 are connected in series or in parallel by using the cell deflectors.

The CTP battery pack provided by the embodiments of the present invention has at least the following beneficial effects or advantages:

In the CTP battery pack provided by the embodiment of the present invention, a plurality of cell units are detachably fixed on the upper end of the bottom carrying unit. It is detachably fixed on the bottom bearing unit; the cell pressure plate is provided with an avoidance groove that penetrates up and down; the cell guide is arranged in the avoidance groove, and the cell guide is used for series or parallel connection of the battery cells. The CTP battery pack, since the positive and negative poles of the battery cells are located on the upper part, and the flow guides between adjacent cells are also on the upper part, which effectively solves the current problem caused by the positive and negative poles of the battery cells on both sides. The bottom deflector cannot be damaged, so that it is inconvenient to take out a single battery cell. At the same time, the battery cells are limited and fixed through the detachable connection between the cell pressure plate and the bottom load-carrying unit; the CTP battery pack designed in this way can not only ensure a stable connection, but also when a single cell is abnormal, only It is necessary to cancel the connection between the cell pressure plate and the bottom carrying unit, and then destroy the cell guide on the upper part of the adjacent cell, then the abnormal cell can be taken out, and the new cell can be replaced with the current guide, which can effectively It solves the technical problem in the prior art that when a single battery cell is abnormal and needs to be repaired, the bottom connection structure cannot be separated, resulting in the inability to repair and replace a single battery cell, and improves the maintenance efficiency of the CTP battery pack.

In the description of the present invention, it should be noted that the terms and nouns in each embodiment, such as "up", "down", "front", "back", "left", "right" and other words indicating orientation, are only In order to simplify the description of the positional relationship based on the drawings in the specification, it does not mean that the components and devices referred to must operate in accordance with the specific orientation and defined operations, methods, and structures in the specification, and such orientation terms do not constitute limitations on the present invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection; can be direct or indirect through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in combination with specific situations.

The above descriptions are only 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 principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A CTP battery pack, characterized in that: comprising the following steps: the battery cell comprises a bottom bearing unit, a battery cell single body (500), a battery cell pressing plate (600) and a battery cell guide piece;

the plurality of battery cell units are detachably fixed at the upper end of the bottom bearing unit;

the positive electrode (501) and the negative electrode (502) of the battery cell unit (500) are arranged at the upper end of the battery cell unit (500) simultaneously;

the battery cell pressing plate (600) is arranged on the bottom bearing unit; the battery cell pressing plate (600) is provided with an avoidance groove (602) penetrating up and down; the cell guide piece is arranged in the avoidance groove (602) and is used for connecting the cell units (500) in series or in parallel.

2. The CTP battery pack according to claim 1, wherein: the bottom carrier unit includes: a battery pack bottom guard plate (100), a water cooling plate (200) and a battery pack lower box body (300);

the water cooling plate (200) is fixed at the upper end of the battery pack bottom guard plate (100); the battery pack lower box body (300) is fixed at the upper end of the water cooling plate (200);

a plurality of longitudinally arranged mounting columns (301) are fixed at the upper edge of the lower box body (300) of the battery pack, and the upper ends of the mounting columns (301) are fixedly connected with the battery core pressing plate (600);

the battery cell unit (500) is detachably fixed on the battery pack lower box body (300).

3. The CTP battery pack according to claim 2, wherein: the upper end of the mounting column 301 is provided with a threaded blind hole (302);

a through hole (601) is formed in the battery core pressing plate (600);

the connecting piece passes through the through hole (601) and the threaded blind hole (302) to fixedly connect the battery core pressing plate (600) with the mounting column (301).

4. The CTP battery pack according to claim 3, wherein: the upper end of the lower box body (300) of the battery pack is provided with a plurality of mounting grooves (303);

each mounting groove (303) is internally fastened with one electric core single body (500).

5. The CTP battery pack according to claim 4, wherein: further comprises: an elastic buffer structure (400);

the mounting groove (303) is arranged as a stepped groove;

each step groove is internally provided with an elastic buffer structure (400), and each elastic buffer structure (400) is internally fastened with one electric core unit (500).

6. The CTP battery pack according to claim 5, wherein: the elastic buffer structure (400) is made of rubber;

the outside of elasticity buffer structure (400) with ladder groove assorted round platform column structure, the inside of elasticity buffer structure (400) be with electric core monomer (500) assorted cavity.

7. The CTP battery pack according to any one of claims 1-6, wherein: the plurality of battery core monomers (500) are arranged in a matrix mode;

the number of the avoidance grooves (602) is the same as the number of the rows of the battery cell monomers (500), and a plurality of the avoidance grooves (602) are distributed in parallel.

8. The CTP battery pack according to any one of claims 2-6, wherein: the battery pack bottom guard plate (100), the water cooling plate (200), the battery pack lower box body (300) and the battery core pressing plate (600) are made of steel or aluminum.

9. The CTP battery pack according to any one of claims 2-6, wherein: the cell guide piece is made of steel, aluminum or nickel.

10. The CTP battery pack according to any one of claims 1-6, wherein: the battery cell unit (500) is of a cylindrical structure.

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