CN112928377A

CN112928377A - Integrated cover plate and power battery module

Info

Publication number: CN112928377A
Application number: CN202110175830.8A
Authority: CN
Inventors: 高灵雷; 刘浩; 张志远; 王永; 杨丹; 王晓晴
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: CN112928377B

Abstract

The invention provides an integrated cover plate and a power battery module, wherein the power battery module comprises a battery unit; the integrated cover plate includes: a cover plate body extending lengthwise, a lengthwise extending direction of which is identical to a length direction of the battery cell; the cover plate body is provided with a first plate wall and a second plate wall which are opposite; the first plate wall is used for facing one side of the width direction of the battery unit; a plurality of limiting rings arranged on the second plate wall; each limiting ring protrudes out of the second plate wall and forms a limiting groove with the second plate wall in an enclosing mode; the limiting rings are arranged into at least one limiting ring group along the height direction; the limiting ring group comprises at least one limiting groove which is arranged in sequence along the lengthwise extending direction; the pole pieces correspond to the limiting rings one by one; the pole pieces are arranged in the corresponding limiting rings; the plurality of pole pieces are used for being connected with the electrodes of the battery unit. The invention provides an integrated cover plate and a power battery module, which reduce the installation difficulty, reduce the labor intensity and improve the labor efficiency.

Description

Integrated cover plate and power battery module

Technical Field

The invention relates to an integrated cover plate and a power battery module.

Background

The power battery system is the most important component in the new energy automobile. The existing power battery system generally comprises a box body and a plurality of power battery modules arranged in the box body. With the development of new energy automobiles, the requirements on the energy density of a power battery system are higher and higher.

The integrated cover plate is an important component in the power battery module. The battery volume in the existing power battery module is generally small. Specifically, the size of the battery in the conventional power battery module is generally standard. Such as 18650 batteries. Thus, existing integrated cover plates are typically small. Therefore, in order to increase the electric energy of the power battery system, the number of the power battery modules can be increased in the box body. Accordingly, the number of corresponding integrated cover plates will also increase. The more integrated cover plates increase the installation difficulty, increase the labor intensity and reduce the labor efficiency.

Therefore, it is necessary to provide an integrated cover plate and a power battery module to solve the above problems.

Disclosure of Invention

The invention aims to provide an integrated cover plate and a power battery module, which reduce the installation difficulty, reduce the labor intensity and improve the labor efficiency.

The above object of the present invention can be achieved by the following technical solutions: an integrated cover plate is used for a power battery module; the power battery module comprises a battery unit; the integrated cover plate includes: a cover plate body extending lengthwise in a direction corresponding to a length direction of the battery cell; the cover plate body is provided with a first plate wall and a second plate wall which are opposite; the first plate wall is used for facing one side of the width direction of the battery unit; a plurality of retaining rings disposed on the second panel wall; each limiting ring protrudes out of the second plate wall and forms a limiting groove with the second plate wall in an enclosing mode; the limiting rings are arranged into at least one limiting ring group along the height direction; the limiting ring group comprises at least one limiting groove which is sequentially arranged along the lengthwise extending length direction; the pole pieces correspond to the limiting rings one by one; the pole pieces are arranged in the corresponding limiting rings; the pole pieces are used for being connected with electrodes of the battery units, so that the battery cells in the battery units can be connected in series and in parallel.

As a preferred embodiment, a plurality of reinforcing beams are arranged in the battery unit; the cover plate body is also provided with a plurality of avoidance grooves, and the avoidance grooves correspond to the plurality of stiffening beams; the avoidance groove is used for the corresponding stiffening beam to pass through.

As a preferred embodiment, the limiting groove comprises a first limiting groove close to the avoiding groove and second limiting grooves located at two sides of the first limiting groove; the number of the first limiting grooves is multiple; the plurality of first limiting grooves correspond to the plurality of avoiding grooves; the avoiding groove is arranged on one side of the corresponding first limiting groove in the height direction of the battery unit.

As a preferred embodiment, the method further comprises: the wiring groove is arranged on the second plate wall and is positioned on one side of the limiting ring group along the height direction of the battery unit; the wiring groove is used for accommodating an acquisition line; the collection line is electrically connected with the pole piece.

As a preferred embodiment, the method further comprises: a sampling component; the pressure detection device is used for detecting the pressure of a battery cell in the battery unit; the pole piece is also provided with an opening; a convex column extending into the open hole is arranged at the bottom of the limiting groove; the convex column is used for fixing the sampling assembly when the sampling assembly is electrically connected with the acquisition line.

As a preferred embodiment, a long groove is arranged on the groove bottom of the limiting groove; the battery unit is used for inserting the electrode of the battery unit so as to be electrically connected with the pole piece.

As a preferred embodiment, the first plate wall is further provided with a plurality of inclined surfaces; the inclined surface is used for being attached to the electrode of the battery unit so as to guide the electrode to be inserted into the long groove.

In a preferred embodiment, the first plate wall is provided with a plurality of convex strips protruding outwards; the inclined planes comprise a first inclined plane and a second inclined plane which are arranged on two sides of the raised line along the width direction; the first inclined surface and the second inclined surface are inclined in opposite directions; the long groove is located between the first inclined surface and the second inclined surface of the adjacent convex strip.

As a preferred embodiment, the power battery module further comprises a power battery module end plate opposite to the second plate wall; the end plate of the power battery module is provided with a bulge part protruding towards the second plate wall; the second plate wall is provided with a sunken part sunken towards the first plate wall; the concave part is used for providing an avoiding space for the convex part so as to reduce a gap between the end plate of the power battery module and the second plate wall.

As a preferred embodiment, the power battery module further comprises a power battery module side plate arranged on one side of the battery unit along the length direction of the battery unit; the two ends of the cover plate body in the lengthwise extending direction are provided with isolation plates; the power battery module end plate is positioned between the two isolation plates, so that the isolation plates isolate the cover plate body from the power battery module side plate when the power battery module side plate is fixed with the power battery module end plate.

A power battery module, it includes: an integrated cover plate as described above; a battery cell facing the first plate wall in a width direction.

The application provides an integrated apron and power battery module's beneficial effect is: this application embodiment integrated apron and power battery module make when the mode lifting system utilization ratio through the length of increase battery cell through setting up apron body, a plurality of spacing groove and a plurality of pole piece, can increase the quantity in spacing groove through the length direction along battery cell, and then make the spacing groove on the apron body can hold more pole pieces at the length direction of battery cell, and then satisfy the demand that increases the electrode connection of battery cell. And when the mode through increasing the height of battery cell promotes the system utilization ratio, can be through the quantity of the direction of height increase spacing ring group along battery cell, and then make the spacing groove on the apron body can hold more pole pieces in battery cell's direction of height, and then satisfy the demand that increases battery cell's electrode connection. When the mode through increasing the height of battery unit, increase the length of battery unit simultaneously promotes the system utilization ratio, can be through the quantity along the length direction increase spacing groove of battery unit, along the quantity of the direction of height increase spacing groove of battery unit simultaneously, and then make the spacing groove on the apron body can hold more pole pieces at the length direction and the direction of height of battery unit, and then satisfy the demand that increases the electrode connection of battery unit. Therefore, the process that each single integrated cover plate needs to be assembled into the power battery module is avoided, the installation difficulty is reduced, the labor intensity is reduced, and the labor efficiency is improved. Therefore, the invention provides an integrated cover plate and a power battery module, which reduce the installation difficulty, reduce the labor intensity and improve the labor efficiency.

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 cover plate body according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a first panel wall of a cover plate body according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a second panel wall of the cover plate body according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram of a battery cell according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a power battery module according to an embodiment of the present disclosure.

Description of reference numerals:

13. a cover plate body; 14. a first panel wall; 15. a second panel wall; 17. a top wall; 19. a bottom wall; 21. a first limit groove; 22. a long groove; 27. pole pieces; 31. an electrode; 33. a first avoidance slot; 35. a second avoidance slot; 37. a second limit groove; 39. a wiring groove; 41. collecting a line; 43. a sampling component; 45. opening a hole; 47. a convex column; 49. a first inclined plane; 51. a second inclined plane; 53. a convex strip; 55. a recessed portion; 57. a separator plate; 59. a limiting groove; 61. a battery cell; 63. an electric core; 65. a first connection portion; 67. a second connecting portion; 69. the power battery module end plate; 71. a power battery module side plate; 73. a limiting ring; 75. and reinforcing the beam.

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 5. The integrated cover plate provided by the application is used for a power battery module; the power battery module comprises a battery unit 61; the integrated cover plate may include: a cover body 13 extending lengthwise in a direction corresponding to the lengthwise direction of the battery cell 61; the cover plate body 13 has a first plate wall 14 and a second plate wall 15 which are opposite; the first plate wall 14 is configured to face one side in the width direction of the battery unit 61; a plurality of retainer rings 73 provided on the second plate wall 15; each limiting ring 73 protrudes out of the second plate wall 15 and forms a limiting groove with the second plate wall 15; the limiting rings 73 are arranged into at least one limiting ring 73 group along the height direction; the limiting ring 73 group comprises at least one limiting groove which is sequentially arranged along the lengthwise direction of the lengthwise extension; the pole pieces 27 correspond to the limiting rings 73 one by one; the pole pieces 27 are arranged in the corresponding limiting rings 73; the pole pieces 27 are used for being connected with electrodes of the battery unit 61, so that the cells in the battery unit 61 can be connected in series and in parallel.

The technical scheme shows that: the integrated cover plate of the embodiment of the application enables the number of the limiting grooves 59 to be increased along the length direction of the battery unit 61 when the system utilization rate is increased by increasing the length of the battery unit 61 through the cover plate body 13, the limiting rings 73 and the pole pieces 27, so that the limiting grooves 59 on the cover plate body 13 can accommodate more pole pieces 27 along the length direction of the battery unit 61, and the requirements of increasing the cell series and parallel connection in the battery unit 61 are met. When the system utilization rate is increased by increasing the height of the battery unit 61, the number of the limiting ring 73 groups can be increased along the height direction of the battery unit 61, so that the limiting groove 59 on the cover plate body 13 can accommodate more pole pieces 27 in the height direction of the battery unit 61, and the requirements of increasing the series and parallel connection of the battery cells in the battery unit 61 are met. When the height of the battery unit 61 is increased and the utilization rate of the system is increased by increasing the length of the battery unit 61, the number of the limiting grooves 59 can be increased along the length direction of the battery unit 61, and the number of the limiting grooves 59 can be increased along the height direction of the battery unit 61, so that more pole pieces 27 can be accommodated in the limiting grooves 59 on the cover plate body 13 along the length direction and the height direction of the battery unit 61, and the requirements of increasing the cell strings and the cell parallel connection in the battery unit 61 are met. Therefore, the process that each single integrated cover plate needs to be assembled into the power battery module is avoided, the installation difficulty is reduced, the labor intensity is reduced, and the labor efficiency is improved. Furthermore, each limiting groove 59 is spaced by a limiting ring 73, and each limiting ring 73 protrudes out of the second plate wall 15, so that the creepage distance between adjacent limiting grooves 59 can be increased by the limiting rings 73, and further, the insulating property between the pole pieces 27 in the adjacent limiting grooves 59 is improved, and thus, the safety of the battery unit is ensured.

Further, the power battery module includes a housing and a battery unit 61 disposed in the housing. The housing includes two power cell module end plates 69 oppositely disposed in the width direction of the battery unit 61 and two power cell module side plates 71 oppositely disposed in the length direction of the battery unit 61. A cavity is enclosed between the two power battery module end plates 69 and the two power battery module side plates 71. The battery unit 61 is disposed in the cavity. For example, fig. 5 shows an exploded view of a power battery module to which the integrated cover plate according to the embodiment of the present disclosure is applied. Of course, the integrated cover plate according to the embodiment of the present application is not only suitable for the power battery module shown in fig. 5, but also can be of other structures, and the present application is not limited thereto. Further, as shown in fig. 5, the longitudinal direction of the battery unit 61 is the left-right direction. The width direction of the battery unit 61 is the front-rear direction. The height direction of the battery unit 61 is the vertical direction. Two power battery module end plates 69 are provided on opposite sides of the battery unit 61 in the front-rear direction, respectively. The two power battery module side plates 71 are respectively disposed on opposite sides of the battery unit 61 in the left-right direction.

In the present embodiment, the cover body 13 extends lengthwise. The lengthwise extending direction coincides with the longitudinal direction of the battery cell. For example, as shown, the cover body 13 extends in the left-right direction. Further, the cover body 13 is plate-shaped as a whole. Further, the cover body 13 has a first plate wall 14 and a second plate wall 15 opposed in its thickness direction. For example, as shown in fig. 1, the thickness direction of the cover body 13 is a direction perpendicular to the paper surface. The first panel wall 14 faces away from the paper. The second panel wall 15 is facing the page. Further, the first plate wall 14 is adapted to face one side in the width direction of the battery unit 61. So that the second panel wall 15 faces away from the battery unit 61. Further, the cover body 13 has a top wall 17 and a bottom wall 19 opposed in its height direction, as shown in fig. 1, for example.

Further, the first plate wall 14 is provided with a plurality of inclined surfaces. The inclined surface is used for being attached to the electrode 31 of the battery unit 61 so as to guide the electrode 31 to be inserted into the long groove 22, and can be well attached to the bent electrode 31, so that the risk of deformation and failure of the electrode 31 caused by external load is reduced.

Specifically, the first panel wall 14 is provided with a plurality of outwardly projecting ribs 53. The projecting strip 53 extends in the vertical direction, as shown in fig. 3, for example. The plurality of convex strips 53 are arranged at intervals in the left-right direction. The inclined surfaces include a first inclined surface 49 and a second inclined surface 51 provided on both sides of the convex strip 53 in the width direction. For example, as shown in fig. 3, the first inclined surface 49 and the second inclined surface 51 are provided on both sides of the convex strip 53 in the left-right direction. And the first and second inclined surfaces 49 and 51 are inclined in opposite directions. The slot 22 is located between the first ramp 49 and the second ramp 51. So that the electrode 31 of the battery cell 61 can be inserted into the elongated slot 22 through the first inclined surface 49 or the second inclined surface 51.

In the present embodiment, a plurality of retainer rings 73 are provided on the second plate wall 15. Each limiting ring 73 protrudes out of the second plate wall 15 and encloses a limiting groove 59 with the second plate wall 15. Specifically, as shown in fig. 1, for example, each of the stopper rings 73 protrudes from the second plate wall 15 toward the outside of the paper, and defines a stopper groove 59 with the second plate wall 15. Therefore, the limiting grooves 59 are spaced by the limiting rings 73, and each limiting ring 73 protrudes out of the second plate wall 15, so that the creepage distance between the adjacent limiting grooves 59 can be increased by the limiting rings 73, the insulating performance between the pole pieces 27 in the adjacent limiting grooves 59 is further improved, and the safety of the battery unit 61 is ensured.

To further increase the creepage distance between adjacent ones of the retaining grooves 59, for example, as shown in fig. 1, the surface of the second plate wall 15 is recessed toward the first plate wall 14 to form a groove. The grooves correspond one-to-one to the retainer rings 73. This correspondence may be such that the number of grooves 59 is equal to the number of stop rings 73. The limiting ring 73 is arranged around the outer side of the corresponding groove, and a limiting groove is formed between the groove and the limiting ring 73.

Further, the plurality of pole pieces 27 correspond to the plurality of limiting grooves 59 one to one. This correspondence may be such that the number of retention slots 59 is equal to the number of pole pieces 27. The pole pieces 27 are disposed in the corresponding limiting grooves 59. The pole piece 27 may be a bus bar. For example, as shown in fig. 2, the pole piece 27 is square. The retaining groove 59 is square. The limiting groove 59 can be matched with the pole piece 27, and therefore an accommodating space is provided for the pole piece 27. Of course, the pole piece 27 is not limited to be square, but may be other shapes, such as rectangle, and the like. The stopper groove 59 is not limited to a square shape, but may have another shape, such as a rectangular shape, and the like.

Further, the plurality of retaining grooves 59 form at least one set of retaining rings 73 in the height direction of the battery unit 61. For example, as shown in fig. 4, the height direction of the battery unit 61 is the vertical direction. The plurality of stopper grooves 59 form two sets of stopper rings 73 arranged in this order in the vertical direction.

Further, the battery unit 61 includes a plurality of electric core assemblies arranged in sequence in the height direction. The electric core component comprises a plurality of electric cores which are sequentially arranged along the length direction. For example, as shown in fig. 4, the core assemblies are in two groups. Each battery cell assembly comprises a plurality of battery cells which are sequentially arranged along the left-right direction. Further, a liquid cooling structure is provided between the adjacent electric core assemblies 31. So this liquid cooling structure can with every electric core 33 direct contact in the electric core subassembly of its upper and lower both sides, and then can be to every electric core direct cooling in the electric core subassembly of its upper and lower both sides.

Specifically, the liquid cooling structure extends along the length direction of the battery unit so as to be in direct contact with each battery cell in the battery cell assembly. Because the extending direction of the liquid cooling structure is consistent with the extending direction of the battery unit, the liquid cooling structure can be in direct contact with the side face of each battery cell in the battery cell assembly along one side of the height direction of the battery cell assembly in the extending direction of the liquid cooling structure.

Further, a plurality of core assemblies correspond to the plurality of sets of retainer rings 73. The set of limiting rings 73 is used for connecting the electrode 31 of the corresponding electric core assembly with the pole piece 27. For example, as shown in fig. 4, the core assemblies are in two groups. Specifically, the two groups of cell assemblies are respectively a first cell assembly located above and a second cell assembly located below. Further, the two sets of the retainer rings 73 are provided. Specifically, the two sets of limiting rings 73 are respectively a first set of limiting rings located above and a second set of limiting rings located below. Further, the two sets of limiting rings 73 are respectively used for electrically connecting the electrodes 31 of the cells in the two sets of cell assemblies with the pole pieces 27. Specifically, the first limiting group is used for electrically connecting the electrodes 31 of the cells in the first cell group with the pole pieces 27. The second limiting group is used for electrically connecting the electrodes 31 of the cells in the second cell group with the pole pieces 27. When the system utilization rate is improved by increasing the height of the battery unit 61, the number of the sets of the limiting rings 73 can be increased along the height direction of the battery unit 61, so that the limiting grooves 59 in the cover plate body 13 can accommodate more pole pieces 27 in the height direction of the battery unit 61, and the requirement for increasing the connection of the electrodes 31 of the battery unit 61 is met.

Further, the set of limiting rings 73 comprises at least one limiting groove 59 arranged in sequence along the length direction of the battery unit 61. The at least one may be 1 or more. As shown in fig. 1, for example, the set of retaining rings 73 includes a plurality of retaining grooves 59 along the length of the battery unit 61. Therefore, when the system utilization rate is improved by increasing the length of the battery unit 61, the number of the limiting grooves 59 can be increased along the length direction of the battery unit 61, so that the limiting grooves 59 on the cover plate body 13 can accommodate more pole pieces 27 in the length direction of the battery unit 61, and the requirement for increasing the connection of the electrodes 31 of the battery unit 61 is met.

In the present embodiment, the plurality of pole pieces 27 are used to connect to the electrodes 31 of the battery unit 61 so that the cells in the battery unit 61 can be connected in series and parallel. The cells 63 in the battery unit 61 can thereby be connected in series-parallel via the pole pieces 27. Further, the long groove 22 is provided on the groove bottom of the stopper groove 59. For example, as shown in fig. 3, the long groove 22 extends in the vertical direction. The slot 22 extends through the slot base and is located between the first and second inclined surfaces 49, 51 on the first panel wall 14. So that the electrode 31 of the battery cell 61 can be inserted into the elongated slot 22 through the first inclined surface 49 or the second inclined surface 51. Specifically, as shown in fig. 4, for example, the electrode 31 of the battery cell 61 includes a first tab and a second tab of opposite polarities. More specifically, the first tab may be a positive electrode tab. The second tab may be a negative tab. Alternatively, the first tab may be a negative tab. The second tab may be a positive tab, which is not specified in this application. Further, the first tab and the second tab are oppositely disposed along the thickness direction of the cover plate body 13. For example, the first tab is facing into the page. The second ear is north to the paper. The first tab, which is oriented into the paper, can thus be guided from the side of the first plate wall 14 into the elongated slot 22 by means of the first bevel 49 and/or the second bevel 51 and project through the elongated slot 22 out of the second plate wall 15. Further, the elongated slot 22 is used for inserting the electrode 31 of the battery unit 61 so as to be electrically connected with the pole piece 27. Specifically, when the first tab enters the elongated slot 22 from one side of the first plate wall 14 through the guidance of the first inclined surface 49 and/or the second inclined surface 51 and extends out of the second plate wall 15 through the elongated slot 22, the first tab can be welded to the pole piece 27 embedded in the limiting slot 59, so that the first tab is electrically connected to the pole piece 27. Further, the long groove 22 is in clearance fit with the electrode 31. This provides sufficient space for the electrode 31 in the event of an external force being involved, reducing the risk of damage to the electrode 31.

Further, the cover plate body 13 according to the embodiment of the present application is made of an insulating material, so that the insulating cover plate can be insulated from the pole piece 27, the electrode 31, the collection wire 41 and the sampling assembly 43 disposed thereon. Specifically, the insulating material may be, for example, plastic, but the insulating material is not limited to plastic, and may be resin or the like, and the present application does not limit the insulating material.

Further, a fixing portion for fixing the pole piece 27 is provided on the stopper groove 59. Specifically, the fixing portion may be a bendable elastic sheet fixed to the second plate wall 15. Therefore, after the pole piece 27 is accommodated in the limiting groove 59, the pole piece 27 can be fixed by bending the elastic sheet to the side of the pole piece 27 far away from the battery unit 61.

Further, a plurality of reinforcing beams 75 are provided in the battery unit 61. The stiffening beam 75 is disposed in the cell assembly. The reinforcing beam 75 extends in the longitudinal direction of the battery cell 63. The reinforcing beam 75 is fixed to the casing at both ends thereof. The reinforcing beam 75 can improve the structural strength of the power battery module.

Further, the cover plate body 13 is provided with a plurality of avoiding grooves. The plurality of escape slots correspond to the plurality of reinforcement beams 75. The escape slots are adapted to allow the corresponding stiffening beams 75 to pass through. So that the stiffening beam 75 in the battery unit 61 can pass through the escape slot and then pass over the cover body 13 and extend to the power battery module end plate 69.

Further, the limiting groove 59 includes a first limiting groove 21 close to the avoiding groove and second limiting grooves 37 located at both sides of the first limiting groove 21. Specifically, for example, the reinforcing beam 75 includes a body and an extension extending lengthwise from the body. Further, the extension part comprises a first extension part and a second extension part which are arranged at intervals along the width direction of the extension part. Specifically, the width direction of the reinforcing beam 75 is the vertical direction. The first extension part and the second extension part are spaced from each other in the up-down direction. The first extension part is positioned above the second extension part. Further, the number of the avoidance grooves is two. The two avoidance grooves are respectively arranged on two sides of the cover plate body 13 in the width direction. In particular, the two avoidance slots are a first avoidance slot 33 and a second avoidance slot 35, respectively, provided on the top wall 17 and the bottom wall 19. More specifically, the first avoiding groove 33 is a recess formed by recessing the surface of the top wall 17 toward the surface of the bottom wall 19. The second avoiding groove 35 is a groove formed by recessing the surface of the bottom wall 19 toward the surface of the top wall 17. Further, the first and second avoiding

grooves

33 and 35 are for the first and second extending portions to pass through, respectively.

Further, the first limiting groove 21 is plural. The plurality may be 2, 3, 4, etc. The plurality of first stopper grooves 21 correspond to the plurality of avoidance grooves. The escape groove is provided on one side of the corresponding first stopper groove 21 in the height direction of the battery unit 61. Specifically, the first limit groove 21 is located between the first escape groove 33 and the second escape groove 35. More specifically, the first stopper groove 21 has a first groove wall and a second groove wall that are opposite to each other in the width direction of the cover plate body 13. For example, as shown in fig. 2, the width direction of the cover body 13 is the vertical direction. The first avoiding groove 33 is recessed from the top wall 17 toward the bottom wall 19 of the cover body 13 and is recessed toward the second groove wall through the first groove wall. The second avoiding groove 35 is recessed from the bottom wall 19 of the cover body 13 toward the top wall 17 and is recessed toward the first groove wall through the second groove wall. So that the first limiting groove 21 is positioned between the first avoiding groove 33 and the second avoiding groove 35, the space occupied by the limiting groove 59 and the avoiding groove on the cover plate body 13 can be reduced.

Further, the power battery module of this application embodiment still includes: a wiring trough 39. The cabling channel 39 is provided in the second panel wall 15. And the wiring groove 39 is located on one side of the retainer ring 73 group in the height direction of the battery unit 61. For example, as shown in fig. 1, the routing channel 39 is located above the set of stop collars 73. The wiring groove 39 accommodates the collecting wire 41. The pickup line 41 may be, for example, an FPC. The collection line 41 is electrically connected to the pole piece 27.

Further, the power battery module of this application embodiment still includes: a sampling assembly 43. The sampling assembly 43 is used to detect the pressure of the cells within the battery unit 61. The pole piece 27 is also provided with an aperture 45. The bottom of the limiting groove 59 is provided with a convex column 47 extending into the opening 45. Specifically, as shown in fig. 1 for example, the stud 47 extends from the second plate wall 15 of the cover plate body 13 away from the second plate wall 15 and through the opening 45 in the pole piece 27. Further, the convex pillar 47 is used for fixing the sampling assembly 43 when the sampling assembly 43 is electrically connected with the collection wire 41. Specifically, the sampling assembly 43 may be fixed to the boss 47 by riveting during installation, so that the sampling assembly 43 can be fixed. Of course, the fixing manner of the sampling assembly 43 and the convex pillar 47 is not limited to riveting, and other manners such as screw connection, bolt connection, welding, integral molding, etc. may also be adopted. The sampling assembly 43 can be electrically connected to the sampling line 41 by soldering.

Further, the power cell module end plate 69 faces the second plate wall 15. And the end plate 69 of the power battery module is provided with a projection projecting toward the second plate wall 15. The second panel wall 15 is provided with a recess 55 recessed toward the first panel wall 14. For example, as shown in fig. 1, the surface of the second panel wall 15 is recessed toward the side facing away from the paper surface to form a recessed portion 55. The concave portion 55 is used to provide an escape space for the convex portion, so as to reduce the gap between the end plate 69 of the power battery module and the second plate wall 15 of the cover plate body 13.

Further, the power battery module side plate 71 is provided on one side of the battery unit 61 in the longitudinal direction of the battery unit 61. Both ends of the cover body 13 in the length direction thereof are provided with partition plates 57. The power cell module end plate 69 is positioned between the two separator plates 57 such that the separator plates 57 isolate the cover plate body 13 from the power cell module side plates 71 when the power cell module side plates 71 are secured to the power cell module end plate 69. And further, the cover plate body 13 and the power battery module side plate 71 are insulated from each other, so that an electric leakage accident between the pole piece 27 on the cover plate body 13 and the power battery module side plate 71 is avoided.

Further, as shown in fig. 3, the cover plate body 13 is further provided with a plurality of first connecting portions 65. The first connecting portions 65 are disposed between adjacent sets of the retainer rings 73. The first connecting portion 65 is used for fixing the liquid cooling structure between the adjacent sets of the limiting rings 73 on the battery unit 61, and further fixing the cover plate body 13. The first connection portion 65 may be a connection hole, for example. So that the cover plate body 13 and the liquid cooling structure can be bolt-fixed by the first connection portion 65. Fixing screws and the like.

Further, as shown in fig. 3, the cover plate body 13 is further provided with a plurality of second connecting portions 67. The second connecting portion 67 is disposed at the bottom of the cover body 13. The second connecting portion 67 is used for fixing with the casing of power battery module mutually, and then strengthens the fastness that apron body 13 is fixed. Specifically, the housing of the power battery module further includes a power battery module bottom plate located below the cover plate body 13. The second connection portion 67 may be a connection hole, for example. So that the cover plate body 13 and the power battery module bottom plate can be fixed by bolts through the second connecting parts 67. Fixing screws and the like.

Further, this application embodiment still provides a power battery module, and it includes: an integrated cover plate as described above; and a battery unit 61 facing the first panel wall 14 in the width direction.

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 subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.

Claims

1. An integrated cover plate is used for a power battery module; the power battery module comprises a battery unit; characterized in that, integrated apron includes:

a cover plate body extending lengthwise in a direction corresponding to a length direction of the battery cell; the cover plate body is provided with a first plate wall and a second plate wall which are opposite; the first plate wall is used for facing one side of the width direction of the battery unit;

a plurality of retaining rings disposed on the second panel wall; each limiting ring protrudes out of the second plate wall and forms a limiting groove with the second plate wall in an enclosing mode; the limiting rings are arranged into at least one limiting ring group along the height direction; the limiting ring group comprises at least one limiting groove which is sequentially arranged along the lengthwise extending length direction;

the pole pieces correspond to the limiting rings one by one; the pole pieces are arranged in the corresponding limiting rings; the pole pieces are used for being connected with electrodes of the battery units, so that the battery cells in the battery units can be connected in series and in parallel.

2. The integrated cover plate of claim 1, wherein a plurality of stiffening beams are disposed within the battery cell; the cover plate body is also provided with a plurality of avoidance grooves, and the avoidance grooves correspond to the plurality of stiffening beams; the avoidance groove is used for the corresponding stiffening beam to pass through.

3. The integrated cover plate of claim 2, wherein the limiting groove comprises a first limiting groove adjacent to the avoiding groove and second limiting grooves at both sides of the first limiting groove; the number of the first limiting grooves is multiple; the plurality of first limiting grooves correspond to the plurality of avoiding grooves; the avoiding groove is arranged on one side of the corresponding first limiting groove in the height direction of the battery unit.

4. The integrated cover plate of claim 1, further comprising: the wiring groove is arranged on the second plate wall and is positioned on one side of the limiting ring group along the height direction of the battery unit; the wiring groove is used for accommodating an acquisition line; the collection line is electrically connected with the pole piece.

5. The integrated cover plate of claim 4, further comprising: a sampling component; the pressure detection device is used for detecting the pressure of a battery cell in the battery unit; the pole piece is also provided with an opening; a convex column extending into the open hole is arranged at the bottom of the limiting groove; the convex column is used for fixing the sampling assembly when the sampling assembly is electrically connected with the acquisition line.

6. The integrated cover plate according to claim 1, wherein a long groove is arranged on the groove bottom of the limiting groove; the battery unit is used for inserting the electrode of the battery unit so as to be electrically connected with the pole piece.

7. The integrated cover plate of claim 6, wherein the first plate wall is further provided with a plurality of inclined surfaces; the inclined surface is used for being attached to the electrode of the battery unit so as to guide the electrode to be inserted into the long groove.

8. The integrated cover of claim 7, wherein the first panel wall has a plurality of outwardly projecting ribs thereon; the inclined planes comprise a first inclined plane and a second inclined plane which are arranged on two sides of the raised line along the width direction; the first inclined surface and the second inclined surface are inclined in opposite directions; the long groove is located between the first inclined surface and the second inclined surface of the adjacent convex strip.

9. The integrated cover plate of claim 1, wherein the power cell module further comprises a power cell module end plate facing the second plate wall; the end plate of the power battery module is provided with a bulge part protruding towards the second plate wall; the second plate wall is provided with a sunken part sunken towards the first plate wall; the concave part is used for providing an avoiding space for the convex part so as to reduce a gap between the end plate of the power battery module and the second plate wall.

10. The integrated cover plate of claim 9, wherein the power battery module further comprises a power battery module side plate disposed at one side of the battery unit along a length direction of the battery unit; the two ends of the cover plate body in the lengthwise extending direction are provided with isolation plates; the power battery module end plate is positioned between the two isolation plates, so that the isolation plates isolate the cover plate body from the power battery module side plate when the power battery module side plate is fixed with the power battery module end plate.

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

the integrated cover plate of any one of claims 1 to 10;

a battery cell facing the first plate wall in a width direction.