CN112928364A

CN112928364A - Power battery module and shell thereof

Info

Publication number: CN112928364A
Application number: CN202110175828.0A
Authority: CN
Inventors: 张志远; 黄骏; 黄文雪; 童邦; 刘浩; 高灵雷
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-06-08
Anticipated expiration: 2041-02-09
Also published as: CN112928364B

Abstract

The invention provides a power battery module and a shell thereof, wherein the shell of the power battery module comprises: a housing body having an interior cavity, the interior cavity having an opening; the inner cavity is used for accommodating the battery unit; the battery unit comprises a plurality of battery cores which are sequentially overlapped along a first direction; the thickness direction of the battery cell is consistent with the first direction; one side of the battery cell along the thickness direction of the battery cell is provided with a first end surface facing to the opening; a liquid cooling structure disposed on the housing body and covering the opening; one side of the liquid cooling structure, which is close to the battery unit, is provided with a first surface extending along a first direction; the first surface is contacted with the first end surface of each battery cell; a liquid cooling runner for containing cooling liquid is arranged in the liquid cooling structure; the cooling liquid is used for cooling each first end surface through the first surface. The invention provides a power battery module and a shell thereof, which can improve the cooling effect and improve the use safety.

Description

Power battery module and shell thereof

Technical Field

The invention relates to a power battery module and a shell thereof.

Background

The power battery system is the most important component in the new energy automobile. With the development of new energy automobiles, the requirements on the energy density of a power battery system are higher and higher.

The existing power battery system generally comprises a box body and a plurality of power battery modules arranged in the box body. The power battery module comprises a shell and a battery unit positioned in the shell. In order to cool the battery unit, a liquid cooling device is generally disposed on the housing. But the existing liquid cooling device is located on the floor of the housing. And in order to avoid the great and then improvement electric core safety of using of the inside and marginal difference in temperature of electric core, set up thermal-insulated cotton usually between liquid cooling device and the battery unit. So, because the existence of thermal-insulated cotton, the interval between liquid cooling device and the battery unit is great, so influences the cooling effect of liquid cooling device and electric core unit.

Therefore, it is necessary to provide a power battery module and a housing thereof to solve the above problems.

Disclosure of Invention

The invention aims to provide a power battery module and a shell thereof, which can improve the cooling effect and improve the use safety.

The above object of the present invention can be achieved by the following technical solutions: a power battery module casing, it includes: a housing body having an interior cavity, the interior cavity having an opening; the inner cavity is used for accommodating a battery unit; the battery unit comprises a plurality of battery cells which are sequentially overlapped along a first direction; the thickness direction of the battery cell is consistent with the first direction; one side of the battery cell in the thickness direction of the battery cell is provided with a first end face facing the opening; a liquid cooling structure disposed on the housing body and covering the opening; one side of the liquid cooling structure, which is close to the battery unit, is provided with a first surface extending along the first direction; the first surface is in contact with the first end face of each of the cells; a liquid cooling runner for containing cooling liquid is arranged in the liquid cooling structure; the cooling liquid is used for cooling each first end face through the first surface.

As a preferred embodiment, a heating mechanism is arranged on one side of the liquid cooling structure away from the battery unit; the heating mechanism is used for heating the cooling liquid, and then the electric core is preheated through the cooling liquid.

As a preferred embodiment, the liquid cooling structure includes a cooling portion and a position limiting portion; the cooling part is in contact with the first end face; the number of the limiting parts is two; the two limiting parts are arranged on two sides of the cooling part along the width direction of the cooling part; the two limiting parts are respectively used for abutting against the opposite sides of the battery unit so as to limit the battery unit.

In a preferred embodiment, the cooling part has a hollow structure; the cooling portion includes a first plate body close to the battery cell and a second plate body far from the battery cell; the first plate body and the second plate body are internally provided with the liquid cooling flow passages; the surface of the first plate body, which is opposite to the second plate body, forms the first surface; and a heating mechanism is arranged on one side of the second plate body, which is back to the first plate body.

In a preferred embodiment, the limiting part is a limiting plate vertically connected with the cooling part; the limiting plate has a stop surface facing the battery cell; the stop surface is used for abutting against the battery unit so as to limit the movement of the battery unit.

As a preferred embodiment, the case body includes two power battery module end plates disposed opposite to each other in the width direction of the cooling portion; two sides of the limiting plate, which are far away from the cooling part, are respectively connected with a connecting plate; and each connecting plate is provided with a connecting hole for connecting with one end plate of the power battery module.

As a preferred embodiment, the case body further comprises two power battery module side plates oppositely arranged along the length direction of the cooling part; connecting columns are respectively arranged on the two sides of the cooling part along the length direction of the cooling part; each connecting column can be respectively matched with a plug-in groove on the side plate of the power battery module in a plug-in manner.

As a preferred embodiment, the connecting column comprises a reduced diameter section close to the cooling section and an expanded diameter section far from the cooling section; the reducing section is used for being in splicing fit with the splicing grooves on the side plates of the power battery module; the diameter expanding section is used for limiting the power battery module side plates to move away from the diameter reducing section along the axial direction.

As a preferred embodiment, the cooling part is provided with a plurality of mounting parts at intervals along the length direction; a power battery module stiffening beam is arranged in the battery unit; the installation part is used for being fixed with the power battery module stiffening beam mutually.

A power battery module, it includes: a housing body having an interior cavity, the interior cavity having an opening; a battery cell disposed in the internal cavity; the battery unit comprises a plurality of battery cells which are sequentially overlapped along a first direction; the thickness direction of the battery cell is consistent with the first direction; one side of the battery cell in the thickness direction of the battery cell is provided with a first end face facing the opening; a liquid cooling structure disposed on the housing body and covering the opening; one side of the liquid cooling structure, which is close to the battery unit, is provided with a first surface extending along the first direction; the first surface is in contact with the first end face of each of the cells; a liquid cooling runner for containing cooling liquid is arranged in the liquid cooling structure; the cooling liquid is used for cooling each first end face through the first surface.

The application provides a power battery module and beneficial effect of casing thereof is: the power battery module and the shell thereof are provided with the shell body and the liquid cooling structure; wherein, the shell body has an inner cavity. The inner cavity has an opening. The inner cavity is used for accommodating the battery unit. The battery unit includes a plurality of battery cells stacked in sequence in a first direction. The thickness direction of the battery core is consistent with the first direction. One side of the battery cell in the thickness direction of the battery cell is provided with a first end face facing to the opening. That is to say that the electricity core is put towards open side through first terminal surface in the shell body. Further, the liquid cooling structure covers the opening. One side of the liquid cooling structure, which is close to the battery unit, is provided with a first surface extending along a first direction. The first surface is in contact with the first end face of each cell. Thereby a liquid cooling runner for accommodating cooling liquid is arranged in the liquid cooling structure; the cooling liquid is used for cooling each first end surface through the first surface. So on the one hand make the liquid cooling structure can with every electric core direct contact, improve the cooling effect, on the other hand because liquid cooling structure direct contact be first terminal surface, and first terminal surface is less for the area on other surfaces of electric core, so can avoid the inside and marginal difference in temperature of electric core great and then improve the security that electric core used. Therefore, the invention provides a power battery module and a shell thereof, which can improve the cooling effect and improve the use safety.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a power battery module according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a power battery module according to an embodiment of the present disclosure;

FIG. 3 is a top view of a liquid cooling structure provided in an embodiment of the present application;

fig. 4 is a bottom view of a liquid cooling structure provided in an embodiment of the present application;

fig. 5 is a schematic view of a side of a first plate body opposite to a first surface according to an embodiment of the present disclosure;

fig. 6 is an installation schematic diagram of an integrated cover plate, a liquid cooling structure and a power battery module end plate according to an embodiment of the present application.

Description of reference numerals:

13. a housing body; 14. an inner cavity; 15. a liquid cooling structure; 17. a first surface; 19. a first end face; 21. a battery cell; 22. an electric core; 27. a cooling section; 31. a first limiting part; 33. a second limiting part; 34. a second end face; 35. a first plate body; 39. a second plate body; 41. a liquid cooling flow passage; 43. a heating mechanism; 45. a first stop surface; 46. a second stop surface; 47. the power battery module end plate; 49. connecting holes; 51. a connecting plate; 53. a power battery module side plate; 55. connecting columns; 57. a reducing section; 59. a diameter expanding section; 61. an installation part; 63. mounting holes; 65. a joint; 67. an upper cover plate; 69. inserting grooves; 71. a reinforcing beam; 73. a first perforation; 75. a second perforation; 77. and (4) integrating the cover plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1 to 6. The application provides a power battery module casing, it can include: a housing body 13 having an inner cavity with an opening; the inner cavity is used for accommodating a battery unit 21; the battery unit 21 includes a plurality of battery cells 22 stacked in sequence in a first direction; the thickness direction of the battery cell 22 is consistent with the first direction; one side of the battery cell 22 in the thickness direction thereof has a first end face 19 facing the opening; a liquid cooling structure 15 disposed on the housing body 13 and covering the opening; one side of the liquid cooling structure 15 close to the battery unit 21 is provided with a first surface 17 extending along the first direction; the first surface 17 is in contact with the first end face 19 of each of the cells 22; a liquid cooling flow channel 41 for containing cooling liquid is arranged in the liquid cooling structure 15; the cooling liquid is used for cooling each first end surface 19 through the first surface 17.

The technical scheme shows that: the power battery module shell of the embodiment of the application is provided with a shell body 13 and a liquid cooling structure 15; wherein the housing body 13 has an inner cavity. The inner cavity has an opening. The cavity is for receiving the battery unit 21. The battery unit 21 includes a plurality of battery cells 22 stacked in sequence in a first direction. The thickness direction of the cell 22 coincides with the first direction. One side of the battery cell 22 in the thickness direction thereof has a first end surface 19 facing the opening. That is, the battery cell 22 is disposed in the housing body 13 through the first end surface 19 toward the open side. I.e., the cells 22 are laterally disposed in the first direction. Further, the liquid-cooled structure 15 covers the opening. The side of the liquid cooling structure 15 adjacent to the battery cell 21 has a first surface 17 extending in a first direction. The first surface 17 is in contact with the first end face 19 of each cell 22. Thus, a liquid cooling flow passage 41 for receiving the cooling liquid is provided in the liquid cooling structure 15; the cooling liquid is used to cool each first end surface 19 via the first surface 17. So on the one hand make liquid cooling structure 15 can with every electric core 22 direct contact, improve the cooling effect, on the other hand because liquid cooling structure 15 direct contact be first terminal surface 19, and first terminal surface 19 is less for the area on other surfaces of electric core 22, so can avoid the inside and marginal difference in temperature of electric core 22 great and then improve the security that electric core 22 used.

In the present embodiment, the case body 13 has a hollow structure as a whole. The hollow structure forms an internal cavity. Further, the inner cavity has an opening. For example, as shown in fig. 1, the inner cavity of the case body 13 is open downward. Further, the case body 13 includes two power battery module end plates 47 disposed opposite to each other and two power battery module side plates 53 disposed opposite to each other. Further, the case body 13 further includes an upper cover plate 67. An inner cavity is defined by the upper cover plate 67, the two power battery module end plates 47 and the two power battery module side plates 53. Further, as shown in fig. 2, for example, two power battery module end plates 47 are disposed opposite to each other in the front-rear direction. The two power battery module side plates 53 are disposed opposite to each other in the left-right direction.

Further, the inner cavity is used for accommodating the battery unit 21. The battery unit 21 includes a plurality of battery cells 22 stacked in sequence in a first direction. The thickness direction of the cell 22 coincides with the first direction. For example, as shown in fig. 2, the first direction is a left-right direction. The thickness direction of the battery cell 22 is the left-right direction. Further, the length direction of the battery cell 22 is perpendicular to the first direction. For example, as shown in fig. 2, the longitudinal direction of the battery cell 22 is the front-back direction. The width direction of the battery cell 22 is the up-down direction. So that the cell 22 is positioned laterally in the left-right direction. I.e., the battery cell 22 is disposed toward the lower side. Further, one side of the battery cell 22 in the thickness direction thereof has a first end surface 19 facing the opening. For example, as shown in fig. 2, the battery cell 22 is provided with two tabs along the front, rear, left, and right sides. The downwardly facing side of the cell 22 has a first end face 19. Further, the upward side of the cell 22 has a second end surface 34. Heat insulation cotton is formed between the second end face 34 and the upper cover plate 67. This thermal-insulated cotton is used for reducing the heat exchange that is close to between outlying electric core 22 and the air, avoids the temperature of peripheral electric core 22 lower and causes the temperature difference between electric core 22 too big, reduces the security that causes electric core 22 to use, further prolongs electric core 22's life.

In the present embodiment, the liquid cooling structure 15 is disposed on the case body 13 and covers the opening. For example, as shown in fig. 1, the liquid cooling structure 15 is disposed below the housing body 13. And the liquid cooling structure 15 is connected with the two power battery module end plates 47 and the two power battery module side plates 53, and then the liquid cooling structure 15 covers the opening. Further, a side of the liquid cooling structure 15 adjacent to the battery unit 21 has a first surface 17 extending in a first direction. For example, as shown in fig. 1, the upper surface of the liquid cooling structure 15 extends in the left-right direction to form a first surface 17. Further, the first surface 17 is in contact with the first end face 19 of each cell 22. Specifically, the first surface 17 is coated with a structural adhesive, so that the first surface 17 is in contact with the first end surface 19 of each cell 22 through the structural adhesive. Further, a liquid cooling flow passage 41 for receiving a cooling liquid is provided in the liquid cooling structure 15. The cooling fluid is used to cool each first end surface 19 via the first surface 17. So on the one hand make liquid cooling structure 15 can with every electric core 22 direct contact, improve the cooling effect, on the other hand because liquid cooling structure 15 direct contact be first terminal surface 19, and first terminal surface 19 is less for the area on other surfaces of electric core 22, so can avoid the inside and marginal difference in temperature of electric core 22 great and then improve the security that electric core 22 used.

In one embodiment, the liquid cooling structure 15 includes a cooling portion 27 and a position limiting portion. The cooling portion 27 is formed in a plate shape extending in the first direction as a whole. For example, as shown in fig. 3, the longitudinal direction of the cooling portion 27 is the left-right direction. The width direction of the cooling portion 27 is the front-rear direction. Specifically, the cooling portion 27 has a hollow structure. More specifically, the cooling portion 27 includes a first plate body 35 close to the battery unit 21 and a second plate body 39 remote from the battery unit 21. As shown in fig. 3, for example, the first plate 35 is positioned above the second plate 39. The surface of the first plate body 35 facing away from the second plate body 39 forms the first surface 17. The battery unit 21 is thus positioned above the first plate body 35 and fixed to the first plate body 35 by structural adhesive. Further, liquid cooling channels 41 are provided in the first plate body 35 and the second plate body 39. As shown in fig. 5, for example, a plurality of drainage strips are provided on a surface of the first plate body 35 facing the second plate body 39. The drainage strip extends in a first direction. The drainage strips are arranged at intervals along the direction perpendicular to the first direction. A liquid cooling flow passage 41 is formed between adjacent flow guide strips. Further, the cooling portion 27 is in contact with the first end face 19. The first plate 35 is provided with a joint 65. The connector 65 is adapted to communicate with an external pipeline. The external pipe is used for inputting the cooling liquid into the liquid cooling flow passage 41, so that the cooling liquid can cool each first end surface 19 through the first surface 17.

Further, the limiting parts are two. Two stopper portions are provided on both sides of the cooling portion 27 in the width direction of the cooling portion 27. For example, as shown in fig. 3, the two stoppers are a first stopper 31 and a second stopper 33 provided on both sides of the cooling unit 27 in the front-rear direction. Further, the two position limiting portions are respectively used for abutting against opposite sides of the battery unit 21 so as to limit the position of the battery unit 21. As shown in fig. 3, for example, the battery cell 21 is disposed between the first stopper portion 31 and the second stopper portion 33. The first stopper 31 is configured to abut against the front side of the battery cell 21 so as to be able to stop the battery cell 21. The second stopper 33 is configured to abut against the rear side of the battery cell 21, so as to be able to stop the battery cell 21.

Specifically, the stopper portion is a stopper plate vertically connected to the cooling portion 27. For example, as shown in fig. 3, the stopper plate is provided in the vertical direction. Further, the stopper plate has a stopper surface facing the battery unit 21; the stopper surface is used to abut against the battery cell 21 to restrict the movement of the battery cell 21. For example, as shown in fig. 3, the rear surface of the first stopper plate is a stopper surface. The front surface of the second limit plate is a stop surface. That is, the battery unit 21 is located between the rear surface of the first restriction plate and the front surface of the first restriction plate.

In one embodiment, the side of the liquid cooling structure 15 remote from the battery unit 21 is provided with a heating mechanism 43. For example, as shown in fig. 2 and 4, a heating mechanism 43 is provided below the liquid cooling structure 15. Further, the heating mechanism 43 is configured to heat the cooling liquid, so as to preheat the battery cell 22 through the cooling liquid. Under a low-temperature environment, when the battery cell 22 management system monitors that the battery cell 22 is at a lower temperature, the heating mechanism 43 is started in time to heat the cooling liquid, and heat is transferred to the battery cell 22 through the first end face 19 by the structural adhesive, so that the battery cell 22 is preheated. Specifically, a heating mechanism 43 is disposed on a side of the second plate 39 facing away from the first plate 35. More specifically, the heating mechanism 43 includes a heating pad disposed on the lower surface of the second plate body 39 and an interface connected to the heating pad. The interface is adapted to be connected to external equipment, which in turn enables the external equipment to heat the heating mat, which in turn transfers heat to the cooling fluid through the second plate body 39.

Further, connecting plates 51 are connected to both sides of the stopper plate away from the cooling portion 27. For example, as shown in fig. 3, the upper ends of the first and second stopper plates are connected to connecting plates 51, respectively. Further, the two power battery module end plates 47 are disposed opposite to each other in the width direction of the cooling portion 27. As shown in fig. 2, for example, two power battery module end plates 47 are disposed opposite to each other in the front-rear direction. And each power cell module end plate 47 extends in the length direction of the cooling portion 27. Further, each connecting plate 51 is provided with a connecting hole 49 for connecting with one power battery module end plate 47. As shown in fig. 3, for example, the two connection plates 51 are provided with connection holes 49 that are connected to the two power cell module end plates 47, respectively. Therefore, the power battery module end plate 47 can be detachably connected with the liquid cooling structure 15 through the connecting hole 49, and the installation process of the power battery module shell is simplified. Further, the power cell module end plate 47 is provided with a first through hole 73 for communication with the connection hole 49. The first through hole 73 is connected with the connecting hole 49, so that the power battery module end plate 47 can be detachably connected with the liquid cooling structure 15.

Further, the connection hole 49 is plural, and the plural connection holes 49 are arranged at intervals in the extending direction of the connection plate 51. For example, as shown in fig. 3, the connection plate 51 extends in a first direction. The plurality of connection holes 49 are provided at intervals in the first direction.

Further, the cooling portion 27 is provided with connection posts 55 along both sides in the length direction thereof, respectively. For example, as shown in fig. 3, a connection column 55 is provided on the left side of the cooling portion 27. Further, the two power battery module side plates 53 are disposed opposite to each other in the longitudinal direction of the cooling portion 27. For example, as shown in fig. 1, two power battery module side plates 53 are provided to face each other in the left-right direction. Further, each connecting column 55 can be respectively matched with the inserting groove 69 on one power battery module side plate 53 in an inserting manner. Specifically, the power battery module end plate 47 is located between the battery cells 21 and the connection posts 55. The surface of the power cell module end plate 47 facing the connection post 55 is provided with a plug-in groove 69. The insertion groove 69 is inserted and matched with the connecting column 55, so that the connecting column 55 can limit the power battery module to move along the direction in which the power battery module cannot extend when being cooled.

Further, the connecting column 55 comprises a reduced diameter section 57 close to the cooling section 27 and an enlarged diameter section 59 remote from the cooling section 27. For example, as shown in fig. 3, the reduced diameter section 57 is located below the enlarged diameter section 59. Further, the reducing section 57 is used for being in plugging fit with the plugging groove 69 on the power battery module side plate 53. For example, as shown in fig. 3, the reduced diameter section 57 has a cylindrical shape. So that the reduced diameter section 57 of the cylindrical pile can be inserted into the insertion groove 69. Further, the diameter expanding section 59 serves to restrict the power cell module side plate 53 from moving away from the diameter reducing section 57 in the axial direction. For example, as shown in fig. 3, the expanding section 59 has a cylindrical shape. The diameter expanding section 59 has an outer diameter larger than the diameter reducing section 57, so that the diameter expanding section 59 can limit the side plate 53 of the power battery module from separating from the diameter reducing section 57 upwards. So make power battery module curb plate 53 can realize dismantling with liquid cooling structure 15 and be connected through spliced pole 55, and then simplified the installation of power battery module casing.

Further, the cooling portion 27 is provided with a plurality of mounting portions 61 at intervals along the longitudinal direction thereof. Specifically, the mounting portion 61 includes a plurality of mounting holes 63. The mounting portion 61 includes 3 mounting holes 63, as shown in fig. 3, for example. The 3 mounting holes 63 are arranged at intervals in the width direction of the cooling portion 27. The cooling unit 27 is provided with 3 mounting portions 61 at intervals in the left-right direction. Further, a power battery module reinforcing beam 71 is provided in the battery unit 21. The mounting portion 61 is used for fixing the power battery module reinforcing beam 71. Specifically, the reinforcement beam 71 extends in the width direction of the cooling portion 27. A plurality of reinforcing beams 71 are provided in the battery unit 21. The plurality of reinforcing beams 71 correspond to the plurality of mounting portions 61. The correspondence may be such that the number of reinforcing beams 71 is equal to the number of mounting portions 61. The reinforcing beam 71 is fixed to the corresponding mounting portion 61.

Further, an integrated cover plate 77 is also provided inside the case body 13. The integrated cover plate 77 is located on the side of the power cell module end plate 47 facing the battery cells 21. The integrated cover plate 77 is provided with a protruding plate that protrudes toward the power cell module end plate 47. The power cell module end plate 47 is located on the ledge plate. The convex plate is provided with a second through hole 75 for communicating with the first through hole 73, so that the integrated cover plate 77 and the end plate 47 of the power battery module can be connected with the liquid cooling structure 15 through the first through hole 73, the second through hole 75 and the connecting hole 49. Specifically, the first through hole 73 and the second through hole 75 are provided coaxially with the connection hole 49. And the bolts are inserted into the first through hole 73, the second through hole 75 and the connecting hole 49, so that the integrated cover plate 77, the power battery module end plate 47 and the liquid cooling structure 15 are connected.

Further, as shown in fig. 1, the present application also provides a power battery module, which includes: a housing body 13 having an inner cavity with an opening; the inner cavity is used for accommodating a battery unit 21; the battery unit 21 includes a plurality of battery cells 22 stacked in sequence in a first direction; the thickness direction of the battery cell 22 is consistent with the first direction; one side of the battery cell 22 in the thickness direction thereof has a first end face 19 facing the opening; a liquid cooling structure 15 disposed on the housing body 13 and covering the opening; one side of the liquid cooling structure 15 close to the battery unit 21 is provided with a first surface 17 extending along the first direction; the first surface 17 is in contact with the first end face 19 of each of the cells 22; a liquid cooling flow channel 41 for containing cooling liquid is arranged in the liquid cooling structure 15; the cooling liquid is used for cooling each first end surface 19 through the first surface 17.

It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter disclosed herein is not intended to forego the subject matter 13 nor should the applicant be construed as having considered such subject matter as part of the disclosed subject matter.

Claims

1. The utility model provides a power battery module casing which characterized in that, it includes:

a housing body having an interior cavity, the interior cavity having an opening; the inner cavity is used for accommodating a battery unit; the battery unit comprises a plurality of battery cells which are sequentially overlapped along a first direction; the thickness direction of the battery cell is consistent with the first direction; one side of the battery cell in the thickness direction of the battery cell is provided with a first end face facing the opening;

a liquid cooling structure disposed on the housing body and covering the opening; one side of the liquid cooling structure, which is close to the battery unit, is provided with a first surface extending along the first direction; the first surface is in contact with the first end face of each of the cells; a liquid cooling runner for containing cooling liquid is arranged in the liquid cooling structure; the cooling liquid is used for cooling each first end face through the first surface.

2. The power battery module housing of claim 1, wherein a heating mechanism is disposed on a side of the liquid cooling structure away from the battery unit; the heating mechanism is used for heating the cooling liquid, and then the electric core is preheated through the cooling liquid.

3. The power battery module housing of claim 1, wherein the liquid cooling structure comprises a cooling portion and a limiting portion; the cooling part is in contact with the first end face; the number of the limiting parts is two; the two limiting parts are arranged on two sides of the cooling part along the width direction of the cooling part; the two limiting parts are respectively used for abutting against the opposite sides of the battery unit so as to limit the battery unit.

4. The power battery module housing of claim 3, wherein the cooling portion is a hollow structure; the cooling portion includes a first plate body close to the battery cell and a second plate body far from the battery cell; the first plate body and the second plate body are internally provided with the liquid cooling flow passages; the surface of the first plate body, which is opposite to the second plate body, forms the first surface; and a heating mechanism is arranged on one side of the second plate body, which is back to the first plate body.

5. The power battery module housing of claim 4, wherein the limiting portion is a limiting plate vertically connected to the cooling portion; the limiting plate has a stop surface facing the battery cell; the stop surface is used for abutting against the battery unit so as to limit the movement of the battery unit.

6. The power battery module housing according to claim 3, wherein the housing body includes two power battery module end plates disposed opposite in a width direction of the cooling portion; two sides of the limiting plate, which are far away from the cooling part, are respectively connected with a connecting plate; and each connecting plate is provided with a connecting hole for connecting with one end plate of the power battery module.

7. The power battery module housing of claim 3, wherein the housing body further comprises two power battery module side plates oppositely disposed along a length direction of the cooling portion; connecting columns are respectively arranged on the two sides of the cooling part along the length direction of the cooling part; each connecting column can be respectively matched with a plug-in groove on the side plate of the power battery module in a plug-in manner.

8. The power battery module housing of claim 7, wherein the connecting column comprises a reduced diameter section proximate to the cooling portion and an expanded diameter section distal from the cooling portion; the reducing section is used for being in splicing fit with the splicing grooves on the side plates of the power battery module; the diameter expanding section is used for limiting the power battery module side plates to move away from the diameter reducing section along the axial direction.

9. The power battery module housing of claim 3, wherein the cooling portion is provided with a plurality of mounting portions at intervals along a length direction thereof; a power battery module stiffening beam is arranged in the battery unit; the installation part is used for being fixed with the power battery module stiffening beam mutually.

10. A power battery module, its characterized in that, it includes:

a housing body having an interior cavity, the interior cavity having an opening;

a battery cell disposed in the internal cavity; the battery unit comprises a plurality of battery cells which are sequentially overlapped along a first direction; the thickness direction of the battery cell is consistent with the first direction; one side of the battery cell in the thickness direction of the battery cell is provided with a first end face facing the opening;