CTP battery cell shell, battery cell and direct cooling system

Abstract

The utility model provides a CTP battery cell shell, a battery cell and a direct cooling system, and belongs to the technical field of new energy battery equipment. The CTP battery cell shell comprises an outer shell, a pole is arranged at the top of the outer shell, a liquid cooling pipe is embedded in the outer shell, a liquid cooling water inlet and a liquid cooling water outlet which are connected with the liquid cooling pipe are formed in the bottom of the outer shell, and folding cover plates are hinged to the sides of the liquid cooling water inlet and the liquid cooling water outlet. The folding cover plate is configured to rotate between a first working position and a second working position, the folding cover plate located at the first working position covers the liquid cooling water inlet or the liquid cooling water outlet through a side plate surface, and the folding cover plate located at the second working position is far away from the liquid cooling water inlet or the liquid cooling water outlet; and the other side plate surface is flush with the bottom of the outer shell. The technical problems that in the prior art, CTP battery core mold groups are low in processing efficiency, and the heat exchange and temperature equalization effects are poor due to group form defects are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy battery equipment, and in particular to a CTP battery cell shell, a battery cell and a direct cooling system. Background Art

[0002] CTP, or Cell To PACK, is a battery cell module structure that directly integrates the battery cell pack into the battery pack shell, thereby eliminating the intermediate module architecture, simplifying the battery pack structure, and further improving the space utilization of the battery pack.

[0003] In the related art, in order to suppress the temperature rise problem when the battery cells are stacked into modules and charged and discharged, a liquid cooling plate is usually set at the bottom of the battery cell module to exchange heat and equalize the temperature. In conventional CTP battery cell modules, the single battery cell and the lower liquid cooling plate are usually fixed by applying thermal conductive colloid for bonding.

[0004] The CTP battery module form in the related technology uses a thermally conductive colloid for fixation, which requires the use of special glue coating equipment. After the glue coating process, the colloid needs to be solidified, which seriously affects the CTP production efficiency and increases the integration cost of the CTP system. At the same time, the CTP glue coating method is not easy to repair and maintain later, and the heat exchange cooling is only carried out at the bottom of the battery cell, and its heat exchange area is limited, which also leads to low heat exchange and temperature uniformity efficiency after the module is formed, and poor heat dissipation effect. Utility Model Content

[0005] The embodiment of the utility model provides a CTP battery cell housing, a battery cell and a direct cooling system, which can solve the technical problems in the prior art that the CTP battery cell module group processing efficiency is low and the heat exchange and temperature uniformity effect is poor due to the defects of its grouping form. The technical solution is as follows:

[0006] In a first aspect, an embodiment of the utility model provides a CTP battery cell housing, comprising: an outer housing,

[0007] A pole is arranged on the top of the outer shell, a liquid cooling pipe is pre-buried in the outer shell, a liquid cooling inlet and a liquid cooling outlet connected to the liquid cooling pipe are arranged on the bottom of the outer shell, and folding cover plates are hinged on the sides of the liquid cooling inlet and the liquid cooling outlet, and the folding cover plate is configured to rotate between a first working position and a second working position, the folding cover plate located at the first working position covers the liquid cooling inlet or the liquid cooling outlet through a side plate surface, and the folding cover plate located at the second working position is away from the liquid cooling inlet or the liquid cooling outlet, and is flush with the bottom of the outer shell through the other side plate surface.

[0008] Optionally, the liquid cooling water inlet and the liquid cooling water outlet are arranged on opposite sides of the bottom of the outer shell.

[0009] Optionally, cover mounting grooves are provided on opposite sides of the bottom of the outer housing, the liquid cooling water inlet and the liquid cooling water outlet are respectively arranged in the two cover mounting grooves, the depth of the cover mounting groove matches the thickness of the folding cover, and the folding cover is hinged to one end of the cover mounting groove close to the side wall of the outer housing.

[0010] Optionally, mounting holes are provided on the folding cover.

[0011] Optionally, female connectors are respectively arranged at the liquid cooling water inlet and the liquid cooling water outlet, and the outer diameter of the female connector matches the inner diameter of the mounting hole.

[0012] Optionally, anti-fooling protrusions are provided on at least one of the female connectors, and corresponding anti-fooling grooves are provided on the mounting holes.

[0013] Optionally, an arc chamfer is provided on one side of the folding cover away from the hinged end.

[0014] Optionally, the outer housing is an aluminum housing.

[0015] In a second aspect, an embodiment of the present invention provides an electric core, including the electric core housing described in the first aspect above.

[0016] In a second aspect, an embodiment of the present invention provides a direct cooling system, including the CTP electric core housing described in the first aspect above, further including a liquid cooling base, an inlet interface and an outlet interface for connecting with an external liquid cooling cycle are provided on the liquid cooling base, the CTP electric core housing is installed on the liquid cooling base, the folding cover is in the second working position, the liquid cooling water inlet is connected with the inlet interface, and the liquid cooling water outlet is connected with the outlet interface.

[0017] The beneficial effects brought by the technical solution provided by the embodiment of the present invention at least include:

[0018] By using the CTP electric core housing provided by the embodiment of the present invention, a single CTP electric core is formed by an internal core package. It improves the defects of the existing liquid cooling form, adopts the form of an internal liquid cooling tube, and is connected with an external liquid cooling cycle by arranging a liquid cooling water inlet and a liquid cooling water outlet at the bottom of the outer housing. When the CTP electric core is charged and discharged, coolant is introduced externally for circulation, and the internal liquid cooling tube is directly used to exchange heat and equalize the temperature of the electrolyte and the internal core package. Compared with the form of multi-stage indirect heat exchange through thermal conductive glue and the bottom of the electric core housing, the heat exchange and temperature equalization effect is better. It can also correspondingly eliminate the setting of the liquid cooling plate at the bottom of the traditional electric core module, reducing the space occupation in the battery pack housing.

[0019] By setting an adjustable folding cover structure, it is possible to effectively protect the liquid cooling inlet and the liquid cooling outlet at the bottom of the outer casing while ensuring the convenience of assembly, and improve the overall service life.

[0020] Based on this improvement, the step of gluing and fixing between the bottom of the casing and the traditional liquid cooling plate in the process of forming a module with traditional CTP cells can be omitted. It is only necessary to set the fixed docking with the liquid cooling inlet and the liquid cooling outlet at the corresponding position of the battery pack casing for mounting the cell module, which is convenient for disassembly and maintenance. It can solve the technical problems of low processing efficiency of forming a module with CTP cells in the prior art and poor heat exchange and temperature uniformity effect caused by the defect of its forming form. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is a three-dimensional structural schematic diagram of a CTP cell casing provided by an embodiment of the present invention;

[0023] Figure 2 is a bottom structural schematic diagram of a CTP cell casing provided by an embodiment of the present invention;

[0024] Figure 3 is a structural bottom view of a CTP cell casing provided by an embodiment of the present invention;

[0025] Figure 4 is a structural bottom view of another CTP cell casing provided by an embodiment of the present invention;

[0026] Figure 5 is a structural schematic diagram of a direct cooling system provided by an embodiment of the present invention;

[0027] Figure 6 is a top view structural schematic diagram of a liquid cooling base provided by an embodiment of the utility model.

[0028] In the figure: 1 - outer casing; 2 - liquid cooling base; 11 - pole column; 12 - liquid cooling inlet; 13 - liquid cooling outlet; 14 - folding cover; 15 - cover installation groove; 16 - plug-in female head; 21 - water inlet interface; 22 - water outlet interface; 141 - installation hole; 142 - arc chamfer; 161 - anti-fooling protrusion; 1411 - anti-fooling groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe in detail the embodiments of the present utility model with reference to the accompanying drawings.

[0030] Figure 1 It is a schematic perspective view of a CTP battery cell housing provided by an embodiment of the present utility model; Figure 2 It is a schematic bottom view of a CTP battery cell housing provided by an embodiment of the present utility model; Figure 3 It is a schematic bottom view of a CTP battery cell housing provided by an embodiment of the present utility model; Figure 4 It is a schematic bottom view of another CTP battery cell housing provided by an embodiment of the present utility model; Figure 5 It is a schematic structural view of a direct liquid cooling system provided by an embodiment of the present utility model; Figure 6 It is a schematic top view of a liquid cooling base provided by an embodiment of the utility model. As Figures 1 to 6 shown, an embodiment of the present utility model provides a CTP battery cell housing, including an outer housing 1.

[0031] Among them, a pole column 11 is provided at the top of the outer housing 1, a liquid cooling pipe is embedded in the outer housing 1, and a liquid cooling water inlet 12 and a liquid cooling water outlet 13 connected to the liquid cooling pipe are provided at the bottom of the outer housing 1. Folding covers 14 are hinged on the sides of the liquid cooling water inlet 12 and the liquid cooling water outlet 13, and the folding covers 14 are configured to rotate between a first working position and a second working position. The folding cover 14 in the first working position covers the liquid cooling water inlet 12 or the liquid cooling water outlet 13 through one side plate surface, and the folding cover 14 in the second working position is away from the liquid cooling water inlet 12 or the liquid cooling water outlet 13 and is flush with the bottom of the outer housing 1 through the other side plate surface.

[0032] In the embodiment of the present utility model, the CTP battery cell housing is used to internally accommodate a core package to form a single CTP battery cell. It improves the defects of the existing liquid cooling form, adopts the form of an internally installed liquid cooling pipe, and is connected to an external liquid cooling cycle by arranging a liquid cooling inlet 12 and a liquid cooling outlet 13 at the bottom of the outer housing 1. When the CTP battery cell is charging and discharging, coolant is introduced externally for circulation, and the internal liquid cooling pipe is directly used to exchange heat and equalize the temperature of the electrolyte and the internal core package. Compared with the form of multi-stage indirect heat exchange through thermal conductive glue and the bottom of the battery cell housing, the heat exchange and temperature equalization effect is better. It can also correspondingly eliminate the setting of the liquid cooling plate at the bottom of the traditional battery cell module, reducing the space occupied within the battery pack housing. Based on this improvement, the step of gluing and fixing between the bottom of the housing and the traditional liquid cooling plate during the process of forming a traditional CTP battery cell into a module can be omitted. It only needs to set up the fixed docking with the liquid cooling inlet 12 and the liquid cooling outlet 13 at the corresponding position of the battery pack housing for accommodating the battery cell module, which is convenient for disassembly, installation and maintenance. For example, in a possible implementation manner of the present utility model, the liquid cooling inlet 12 and the liquid cooling outlet 13 are respectively provided with plug-in female heads 16, and the docking can be completed and locked by setting corresponding docking male heads at the accommodating positions of the corresponding battery pack housing. At the same time, it solves the defects of the traditional CTP system forming group with gluing, which requires a large number of gluing devices and has low forming efficiency. By using the CTP battery cell housing provided by the embodiment of the present utility model, the technical problems of low forming and processing efficiency of the CTP battery cell module in the prior art and poor heat exchange and temperature equalization effect caused by the defects of its forming form can be solved.

[0033] Further, in the embodiment of the present utility model, by arranging a folding cover plate 14 corresponding to the liquid cooling inlet 12 and the liquid cooling outlet 13 at the bottom of the outer housing 1, when the single CTP battery cell composed of the outer housing 1 has not been assembled and installed and needs to be stored and transported, the folding cover plate 14 rotates to the first working position, that is, it covers the liquid cooling inlet 12 and the liquid cooling outlet 13 by making one side plate surface adhere to the bottom surface of the outer housing 1 to avoid being knocked and damaged. When the single CTP battery cell is docked and installed with the battery pack housing, the folding cover plate 14 is rotated 180° to the second working position to expose the liquid cooling inlet 12 and the liquid cooling outlet 13 for docking and locking. At this time, the two folding cover plates 14 are folded to the outside away from the liquid cooling inlet 12 and the liquid cooling outlet 13, that is, the outside of the side wall of the outer housing 1, and the other side plate surface is flush with the bottom of the outer housing 1 to avoid interference caused by uneven height during bottom docking. By setting the adjustable folding cover plate 14 structure, it can effectively protect the liquid cooling inlet 12 and the liquid cooling outlet 13 at the bottom of the outer housing 1 while ensuring the assembly convenience, and improve the overall service life.

[0034] Optionally, the liquid cooling water inlet 12 and the liquid cooling water outlet 13 are arranged on opposite sides of the bottom of the outer casing 1. Exemplarily, in the embodiment of the present utility model, the outer casing 1 is a rectangular parallelepiped-shaped casing corresponding to the square shell battery cells in a common CTP battery cell module. The liquid cooling water inlet 12 and the liquid cooling water outlet 13 are respectively arranged at two ends in the length direction of the bottom of the outer casing 1. After the folding cover plate 14 is rotated and unfolded to the second working position, they are respectively led out from the sides where the two short sides of the outer casing 1 are located, effectively avoiding interference during the stacking of multiple CTP battery cells into a module and facilitating combined processing.

[0035] Optionally, cover plate mounting grooves 15 are arranged on opposite sides of the bottom of the outer casing 1. The liquid cooling water inlet 12 and the liquid cooling water outlet 13 are respectively arranged in the two cover plate mounting grooves 15. The depth of the cover plate mounting groove 15 matches the thickness of the folding cover plate 14. The folding cover plate 14 is hinged to one end of the cover plate mounting groove 15 close to the side wall of the outer casing 1. Exemplarily, in the embodiment of the present utility model, by arranging the cover plate mounting grooves 15 communicating with the sides on both sides in the length direction of the outer casing 1, the two folding cover plates 14 are hinged to the connection side of the cover plate mounting groove 15 close to the bottom edge and the side plate of the outer casing 1. When rotated to the first working position, the folding cover plate 14 covers the liquid cooling water inlet 12 or the liquid cooling water outlet 13 and is integrally embedded and stored in the corresponding cover plate mounting groove 15, flush with the bottom plane of the outer casing 1, facilitating the placement of the outer casing 1 and the CTP battery cells and improving practicability.

[0036] Optionally, mounting holes 141 are arranged on the folding cover plate 14. Exemplarily, in the embodiment of the present utility model, by opening mounting holes 141, such as threaded through holes, in the folding cover plate 14, when the folding cover plate 14 is flipped to the second working position, the two folding cover plates 14 on both sides can serve as auxiliary mounting lugs, and are fixed to the installation positions such as the bottom plate of the battery pack casing by inserting screws or bolts into the mounting holes 141, further improving the assembly stability of the CTP battery cells. Further, the plug-in female heads 16 arranged at the liquid cooling water inlet 12 and the liquid cooling water outlet 13 can be set to have an outer diameter slightly smaller than the inner diameter of the mounting holes 141 and are arranged in corresponding positions. When the folding cover plate 14 is flipped to the first working position, the plug-in female heads 16 can be embedded inside the mounting holes 141, using the thickness of the opening to ensure the surrounding protection of the plug-in female heads 16, and at the same time, reducing the overall thickness of the bottom covering positions, including the folding cover plate 14 and the cover plate mounting groove 15, and reducing the space occupied by the CTP battery cell casing in the longitudinal direction.

[0037] Optionally, at least one female connector 16 is provided with an anti-fooling protrusion 161, and a corresponding anti-fooling groove 1411 is provided on the mounting hole 141. Exemplarily, in the embodiment of the present invention, by providing the anti-fooling protrusion 161 on one of the female connectors 16 corresponding to the liquid cooling inlet 12 and the liquid cooling outlet 13, the liquid cooling inlet 12 and the liquid cooling outlet 13 can be distinguished for convenient identification and installation. At the same time, the unilateral setting of the anti-fooling protrusion 161 can also be used as the positive and negative auxiliary distinction of the pole post 11 at the top of the outer casing 1, avoiding reverse installation during assembly and further improving the practicability.

[0038] Optionally, an arc chamfer 142 is provided on the side of the folding cover plate 14 away from the hinge end. Exemplarily, in the embodiment of the present invention, by performing arc chamfering on the side of the folding cover plate 14 away from the hinge end, it can be avoided that the end of the folding cover plate 14 rubs against other components in the battery pack box during the assembly of the outer casing 1 after being rotated to the second working position, further improving the assembly safety.

[0039] Optionally, the outer casing 1 is an aluminum casing.

[0040] Reference Figures 5 to 6 , the embodiment of the present invention also provides a direct cooling system, including a CTP cell casing as Figures 1 to 4 , and further including a liquid cooling base 2. The liquid cooling base 2 is provided with a water inlet interface 21 and a water outlet interface 22 connected to the external liquid cooling circulation. The CTP cell casing is installed on the liquid cooling base 2, the folding cover plate 14 is in the second working position, the liquid cooling inlet 12 is connected to the water inlet interface 21, and the liquid cooling outlet 13 is connected to the water outlet interface 22. Exemplarily, by using the refrigeration system provided by the embodiment of the present invention, the liquid cooling base 2 can be integrated on the bottom plate of the battery pack box, only serving as an external liquid supply circulation function and not being used as a liquid cooling plate, and the complex flow channels inside the liquid cooling plate on the bottom plate of the battery box can be omitted, only ensuring the basic coolant circulation.

[0041] Meanwhile, this CTP battery cell housing is used to house the core package inside to form a single CTP battery cell to cooperate with the direct cooling system. It has improved the defects of the existing liquid cooling form. It adopts the form of an internal liquid cooling pipe, and is connected to the external liquid cooling cycle by setting a liquid cooling water inlet 12 and a liquid cooling water outlet 13 at the bottom of the outer housing 1. When the CTP battery cell is charging and discharging, the coolant is introduced externally for circulation, and the internal liquid cooling pipe is directly used to exchange heat and equalize the temperature of the electrolyte and the internal core package. Compared with the form of multi-stage indirect heat exchange through the thermal conductive adhesive and the bottom of the battery cell housing, the heat exchange and temperature equalization effect is better. It can also correspondingly eliminate the setting of the liquid cooling plate at the bottom of the traditional battery cell module, reducing the space occupation inside the battery pack housing. Based on this improvement, the step of gluing and fixing between the bottom of the housing and the traditional liquid cooling plate during the process of forming the traditional CTP battery cell into a module can be omitted. It only needs to set up the fixed docking with the liquid cooling water inlet 12 and the liquid cooling water outlet 13 at the corresponding position of the battery pack housing for mounting the battery cell module, which is convenient for disassembly and maintenance. For example, in a possible implementation manner of the present invention, the liquid cooling water inlet 12 and the liquid cooling water outlet 13 are respectively provided with plug-in female heads 16, and the docking can be completed and locked by setting corresponding docking male heads at the mounting positions of the corresponding battery pack housing. At the same time, it solves the defects of the traditional CTP system in forming groups, such as the need to increase a large number of gluing devices and the low forming efficiency of the gluing method. Using the CTP battery cell housing provided by the embodiments of the present invention can solve the technical problems of low processing efficiency in forming groups of CTP battery cell modules in the prior art and poor heat exchange and temperature equalization effect due to the defects of its forming form.

[0042] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the specification and claims of the present patent application for the invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. The words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0043] The above are only alternative embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A CTP battery cell housing, characterized in that: include: The outer shell (1), A pole (11) is arranged at the top of the outer shell (1), a liquid cooling pipe is pre-buried in the outer shell (1), a liquid cooling water inlet (12) and a liquid cooling water outlet (13) connected to the liquid cooling pipe are arranged at the bottom of the outer shell (1), and a folding cover plate (14) is hinged on the sides of the liquid cooling water inlet (12) and the liquid cooling water outlet (13), and the folding cover plate (14) is configured to rotate between a first working position and a second working position, the folding cover plate (14) located at the first working position covers the liquid cooling water inlet (12) or the liquid cooling water outlet (13) through a side plate surface, and the folding cover plate (14) located at the second working position is away from the liquid cooling water inlet (12) or the liquid cooling water outlet (13) and is flush with the bottom of the outer shell (1) through another side plate surface.

2. A CTP battery cell housing according to claim 1, characterized in that: The liquid cooling water inlet (12) and the liquid cooling water outlet (13) are arranged on two opposite sides of the bottom of the outer shell (1).

3. A CTP battery cell housing according to claim 1, characterized in that: Cover plate mounting grooves (15) are provided on opposite sides of the bottom of the outer shell (1); the liquid cooling water inlet (12) and the liquid cooling water outlet (13) are respectively provided in the two cover plate mounting grooves (15); the depth of the cover plate mounting groove (15) matches the thickness of the folding cover plate (14); and the folding cover plate (14) is hinged to one end of the cover plate mounting groove (15) close to the side wall of the outer shell (1).

4. A CTP battery cell housing according to claim 3, characterized in that: The folding cover plate (14) is provided with a mounting hole (141).

5. A CTP battery cell housing according to claim 4, characterized in that: The liquid cooling water inlet (12) and the liquid cooling water outlet (13) are respectively provided with a plug-in female connector (16), and the outer diameter of the plug-in female connector (16) matches the inner diameter of the mounting hole (141).

6. A CTP battery cell housing according to claim 5, characterized in that: At least one of the female plug connectors (16) is provided with an anti-mistake protrusion (161), and the mounting hole (141) is provided with a corresponding anti-mistake groove (1411).

7. The CTP battery cell housing according to any one of claims 1 to 6, characterized in that: A circular chamfer (142) is provided on one side of the folding cover plate (14) away from the hinged end.

8. The CTP battery cell housing according to any one of claims 1 to 6, characterized in that: The outer shell (1) is an aluminum shell.

9. A battery cell, characterized in that: Comprising the CTP battery cell shell as described in any one of claims 1 to 6.

10. A direct cooling system, comprising the CTP battery cell housing according to any one of claims 1 to 6, characterized in that: It also comprises a liquid cooling base (2), the liquid cooling base (2) being provided with a water inlet interface (21) and a water outlet interface (22) connected to an external liquid cooling cycle, the CTP battery cell housing being mounted on the liquid cooling base (2), the folding cover plate (14) being located at a second working position, the liquid cooling water inlet (12) being connected to the water inlet interface (21), and the liquid cooling water outlet (13) being connected to the water outlet interface (22).

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