Power battery pack

Abstract

The utility model discloses a power battery pack which comprises a water-cooling box body (1), a CTP module (2) is arranged in the water-cooling box body (1), a box cover (3) is arranged on the water-cooling box body (1), a front end plate fixing plate (4) and a rear end plate fixing plate (5) which are used for fixing the CTP module (2) are arranged in the water-cooling box body (1), the CTP module (2) is divided into end plates (22) and a battery cell (21) arranged between the end plates (22), a pressing plate (23) is arranged between the end plates (22), and the battery cell (21) is arranged between the end plates (22). The end plates (22) are used for fixing in the X direction, the pressing plates (23) are used for fixing in the Y direction and the X direction, a multifunctional integrated enclosure frame structure is formed, and the thermal management system is high in integration efficiency, compatible with gradient configuration of different electric quantity intervals, provided with a modularized and extensible platform solution, efficient, energy-saving and surrounding. Therefore, the battery has the cooling capacity of the corresponding safety level in the fast charging mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and specifically relates to a power battery pack. Background Art

[0002] In today's new energy vehicles, the battery pack is the most core power supply component.

[0003] Patent No. 202010477784.2, published on March 29, 2022, discloses a power battery pack. The power battery pack includes a housing having a chamber, a battery management system housed in the chamber, a conductive member, and paired module units. The two paired module units are arranged in parallel and form a gap. The module units include multiple modules arranged sequentially along a first direction, each having a low-voltage plug-in on one side. The low-voltage plug-ins of each module unit are each positioned in the gap. A first end of the conductive member is electrically connected to the low-voltage plug-in and extends through the gap along the first direction. A second end of the conductive member is electrically connected to the battery management system. By spacing the paired module units to form a gap, the low-voltage plug-ins of multiple modules in the module unit are simultaneously positioned in the gap, making it easier to place the conductive member in the gap. This makes the structure more compact and helps improve the energy density of the power battery pack.

[0004] In the existing technology, a battery pack is usually composed of a battery module + BDU + BMS + structural parts, with a large number of models and sizes, which is not conducive to large-scale production. Utility Model Content

[0005] The utility model aims to provide a power battery pack with high integration and high production efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a power battery pack, including a water-cooling box body, a CTP module is provided in the water-cooling box body, a box cover is provided on the water-cooling box body, and a front end plate fixing plate and a rear end plate fixing plate for fixing the CTP module are provided in the water-cooling box body.

[0007] An explosion-proof valve is provided between the water-cooling box body and the box cover.

[0008] A connector plug is provided on the side of the water cooling box.

[0009] A cavity water channel is provided in the water cooling box body, and a water pipe outlet and a water pipe inlet connected to the cavity water channel are provided on the side of the water cooling box body.

[0010] The CTP module is divided into end plates and battery cells arranged between the end plates, and a pressing plate is arranged between the end plates.

[0011] A water cooling plate is provided between the end plates, and the water cooling plate is located between adjacent battery cells.

[0012] A water inlet pipe and a water outlet pipe are provided in the water cooling plate.

[0013] The end plates are located at both ends of the battery core, the ends of the pressing plate are connected to the end plates via screws, and the pressing plate is attached to the surface of the battery core.

[0014] The end plates are respectively fixed on the front end plate fixing plate and the rear end plate fixing plate.

[0015] An electrical connector port is provided on the box cover.

[0016] The technical effects of the present utility model are: multifunctional integrated frame structure, improved structural strength of the battery pack, with the same material usage, the structural strength is improved, it is detachable and maintainable, saving maintenance costs; modular and expandable, platform solution, compatible with the switching of battery cells from different manufacturers, forming power compatibility; the battery replacement mode interface has reserved switching (electrical interface, liquid cooling interface), the box is compatible with the water cooling plate function, bears the weight of the battery cell and the strength of the battery pack, and forms a water path to provide liquid cooling and heating functions for the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This manual includes the following drawings, which show the following contents:

[0018] Figure 1 This is a schematic structural diagram of a power battery pack of the present utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of a water cooling box for a power battery pack;

[0020] Figure 3 for Figure 1 Schematic diagram of a CTP module of a power battery pack;

[0021] Figure 4 for Figure 1 A schematic diagram of a water cooling plate for a power battery pack;

[0022] Figure 5 for Figure 1 Schematic diagram of a box cover of a power battery pack.

[0023] The markings in the figure are: 1. Water-cooling box; 2. CTP module; 21. Battery cell; 22. End plate; 23. Pressure plate; 24. Water-cooling plate; 25. Water inlet pipe; 26. Water outlet pipe; 3. Box cover; 4. Front plate fixing plate; 5. Rear plate fixing plate; 6. Explosion-proof valve; 7. Connector plug; 8. Cavity water channel; 81. Water pipe outlet; 82. Water pipe inlet; 9. Electrical connector port. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution of the present invention and to facilitate its implementation.

[0025] See also Figure 1-5 A power battery pack includes a water-cooling box 1, a CTP module 2 is provided in the water-cooling box 1, a box cover 3 is provided on the water-cooling box 1, and a front plate fixing plate 4 and a rear plate fixing plate 5 for fixing the CTP module 2 are provided in the water-cooling box 1; it has high integration efficiency, is compatible with gradient configurations in different power ranges, has a modular and scalable platform solution, and an efficient and energy-saving surround thermal management system, so that the battery has a cooling capacity of the corresponding safety level in the fast charging mode.

[0026] An explosion-proof valve 6 is provided between the water-cooling box body 1 and the box cover 3; the explosion-proof valve 6 is used to fix the water-cooling box body 1 and the box cover 3, and at the same time, pressure can be released in dangerous situations to reduce the occurrence of dangerous situations.

[0027] A connector plug 7 is provided on the side of the water-cooling box 1 ; the battery in the water-cooling box 1 is connected by the connector plug 7 and wires.

[0028] A cavity water channel 8 is provided in the water-cooling box body 1, and a water pipe outlet 81 and a water pipe inlet 82 connected to the cavity water channel 8 are provided on the side of the water-cooling box body 1; by forming a circulating water channel, the cavity water channel 8 is utilized to realize the liquid cooling and heating functions of the system.

[0029] The CTP module 2 is divided into end plates 22 and battery cells 21 arranged between the end plates 22. A pressure plate 23 is provided between the end plates 22. The end plates 22 are fixed in the X direction, and the pressure plate 23 is fixed in the Y and X directions to form a multifunctional integrated frame structure.

[0030] A water-cooling plate 24 is provided between the end plates 22, and the water-cooling plate 24 is located between adjacent battery cells 21; the water-cooling plate 24 participates in strengthening the strength of the frame structure as an intermediate structural member, and can realize the water-cooling heat dissipation function. For the fast charging mode, on the basis of water cooling at the bottom of the water-cooling box 1, a full-dimensional heat dissipation effect is achieved on the side of the battery cell 21.

[0031] A water inlet pipe 25 and a water outlet pipe 26 are provided in the water cooling plate 24; the water circulation can be combined with the parallel water circuit of the water cooling box 1 through the water inlet pipe 25 and the water outlet pipe 26 to form a high-efficiency and energy-saving surround thermal management capability.

[0032] The end plates 22 are located at both ends of the battery cell 21, and the ends of the pressure plate 23 are connected to the end plates 22 by screws, and the pressure plate 23 is attached to the surface of the battery cell 21; the end plates 22 and the pressure plate 23 are used to wrap and fix the battery cell 21 to realize an integrated frame structure.

[0033] The end plates 22 are fixed to the front end plate fixing plate 4 and the rear end plate fixing plate 5 respectively, thereby realizing modular installation.

[0034] An electrical connector port 9 is provided on the box cover 3; the front upper end surface of the box cover 3 is reserved for high-voltage charging and discharging connector positions for front-wheel drive, rear-wheel drive and four-wheel drive states of all models, including reserved connector holes for the battery swap mode; battery packs with different scene requirements are reserved for compatibility with different models on the same platform to achieve standard platform products.

[0035] The technical effects of the present utility model are: multifunctional integrated frame structure, improved structural strength of the battery pack, with the same material usage, the structural strength is improved, it is detachable and maintainable, saving maintenance costs; modular and expandable, platform solution, compatible with the switching of battery cells 21 from different manufacturers, forming power compatibility; the battery replacement mode interface reserves the switching electrical interface and liquid cooling interface, the box is compatible with the water cooling plate 24 function, bears the weight of the battery cell 21 and the strength of the battery pack, and forms a water path to provide battery liquid cooling and heating functions.

[0036] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A power battery pack, characterized in that: The invention comprises a water-cooling box (1), wherein a CTP module (2) is provided in the water-cooling box (1), a box cover (3) is provided on the water-cooling box (1), and a front plate fixing plate (4) and a rear plate fixing plate (5) for fixing the CTP module (2) are provided in the water-cooling box (1).

2. A power battery pack according to claim 1, characterized in that: An explosion-proof valve (6) is provided between the water-cooling box body (1) and the box cover (3).

3. A power battery pack according to claim 1 or 2, characterized in that: A connector plug (7) is provided on the side of the water-cooling box (1).

4. The power battery pack according to claim 1, characterized in that: A cavity water channel (8) is provided in the water-cooling box (1), and a water pipe outlet (81) and a water pipe inlet (82) connected to the cavity water channel (8) are provided on the side of the water-cooling box (1).

5. The power battery pack according to claim 1, characterized in that: The CTP module (2) comprises end plates (22) and battery cells (21) arranged between the end plates (22), and a pressing plate (23) is further provided between the end plates (22).

6. The power battery pack according to claim 5, characterized in that: A water cooling plate (24) is provided between the end plates (22), and the water cooling plate (24) is located between adjacent battery cells (21).

7. The power battery pack according to claim 6, characterized in that: A water inlet pipe (25) and a water outlet pipe (26) are provided in the water cooling plate (24).

8. The power battery pack according to claim 5, characterized in that: The end plates (22) are located at both ends of the battery core (21), the ends of the pressing plate (23) are connected to the end plates (22) via screws, and the pressing plate (23) is attached to the surface of the battery core (21).

9. A power battery pack according to claim 5 or 8, characterized in that: The end plates (22) are respectively fixed on the front end plate fixing plate (4) and the rear end plate fixing plate (5).

10. The power battery pack according to claim 1, characterized in that: The box cover (3) is provided with an electrical connector port (9).

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