CN213878313U

CN213878313U - Battery module structure

Info

Publication number: CN213878313U
Application number: CN202120062388.3U
Authority: CN
Inventors: 王颖; 梁宏伟; 彭月猛; 陈保国
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-08-03
Anticipated expiration: 2031-01-11

Abstract

The utility model provides a battery module structure, including upper cover, module frame, electric core subassembly, liquid cold plate, end cover subassembly and No. two end cover subassemblies, wherein the module frame includes bottom plate, curb plate and No. two curb plates, a curb plate install extremely the one end of bottom plate, No. two curb plate installations extremely the other end of bottom plate forms the whole module frame that is the U type, and fixed mounting is glued to the upper surface of bottom plate through the structure to electric core subassembly bottom, and liquid cold plate fixed mounting is to the top of electric core subassembly, and liquid cold plate top is glued through the structure and is installed to the upper cover, and the both ends of upper cover fixed connection respectively to curb plate, No. two curb plates, and an end cover subassembly is installed to one side of module frame, No. two end cover subassemblies are installed to the opposite side of module frame. The utility model provides high space utilization has satisfied the requirement of battery package energy density. The structure of the battery cell is fixed by adopting a glue pouring process, so that the number of parts is reduced, the process is simplified, and the cost is reduced.

Description

Battery module structure

Technical Field

The utility model belongs to the battery field especially relates to a battery module structure.

Background

The existing cylindrical battery technical scheme is mostly a 18650 and 21700 battery grouping system, the volume utilization rate, the system safety and the energy density are relatively low, the cost is relatively high, and the energy density requirement of the power battery is higher and higher along with the improvement of the requirement of the terminal market on the cruising ability of the whole vehicle. However, with the increasing energy density of batteries, the cost and safety of battery systems are also the primary considerations, and the development of large cylindrical batteries and the structural design of modules are yet to be updated.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a battery module structure has improved space utilization, has satisfied the requirement of battery package energy density. The structure of the battery cell is fixed by adopting a glue pouring process, so that the number of parts is reduced, the process is simplified, and the cost is reduced.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a battery module structure comprises an upper cover, a module frame, an electric core component, a liquid cooling plate, a first end cover component and a second end cover component,

wherein the module frame includes bottom plate, curb plate and No. two curb plates, curb plate install extremely No. one end of bottom plate, No. two curb plates install extremely the other end of bottom plate forms the whole module frame that is the U type, and electric core subassembly bottom is through the structure glue fixed mounting to the upper surface of bottom plate, and liquid cooling board fixed mounting is to the top of electric core subassembly, and liquid cooling board top is through the structure glue installation to the upper cover, and the both ends of upper cover fixed connection respectively to curb plate, No. two curb plates, and an end cover subassembly is installed to one side of module frame, and No. two end cover subassemblies are installed to the opposite side of module frame.

Further, electric core subassembly includes a plurality of electric core bodies, and a plurality of electric core bodies are arranged into two-layer formation electric core subassembly in proper order, and the length of electric core subassembly agrees with the length of bottom plate, and the width agrees with the length of curb plate No. one, and first layer electric core body is the dislocation order with second floor electric core body.

Further, the first side plate and the second side plate are identical in structure, a first side plate groove is formed in the inner side of the top of the first side plate, a second side plate groove is formed in the inner side of the top of the second side plate, and the first side plate groove and the second side plate groove are both L-shaped grooves; no. one curb plate and No. two curb plates all are equipped with and subtract heavy logical groove.

Furthermore, the surface of the liquid cooling plate is provided with a plurality of liquid cooling pipes, the middle part of the liquid cooling plate is provided with two water inlets and two water outlets, and the plurality of liquid cooling pipes are communicated to the two water inlets and the two water outlets.

Furthermore, an end cover subassembly and No. two end cover subassembly structures are the same, and an end cover subassembly is connected gradually from interior to exterior by interior insulating part, busbar, external insulation spare, insulating piece and end plate and constitutes, and interior insulating part is equipped with the interior honeycomb holes corresponding with electric core body quantity and position, and external insulation spare is equipped with the outer honeycomb holes corresponding with electric core body quantity and position, and the busbar is equipped with the flow-gathering hole corresponding with electric core body quantity and position.

Further, the busbar uses copper bar stamping forming, connects to the busbar through laser welding or riveting or bolt between a plurality of electric core bodies.

Furthermore, the inner surface of the circumference of the outer honeycomb hole of the outer insulating part is provided with a diversion trench.

Furthermore, the cross section of the end plate is of a T-shaped structure and comprises a closed plate and a fixed plate, the fixed plate is vertically arranged in the middle of the closed plate to form the end plate, the closed plate of the end plate is connected with the insulating sheet to realize the connection of the end plate and the insulating sheet, a closed groove is formed in the top of the closed plate, and the closed groove is also an L-shaped groove.

Furthermore, the upper cover is provided with water inlet and outlet holes corresponding to the two water inlet and outlet holes.

Compared with the prior art, a battery module structure have following advantage:

(1) the utility model relates to a battery module structure, space utilization improves, and the quantity of spare part reduces, and cost reduction, simple process, energy density obtains promoting.

(2) The utility model relates to a battery module structure adopts the glue-pouring technology to realize the fixed structure of electric core, has reduced the quantity of spare part, makes simple process, cost reduction.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is an exploded view of a battery module according to an embodiment of the present invention;

FIG. 2 is a schematic view of a module frame according to an embodiment of the present invention;

fig. 3 is a side view of a first side plate according to an embodiment of the present invention;

FIG. 4 is a schematic view of a cell assembly according to an embodiment of the present invention;

fig. 5 is a schematic view of a liquid cooling plate according to an embodiment of the present invention;

FIG. 6 is a partial schematic view of a busbar according to an embodiment of the present invention;

fig. 7 is a schematic view of an insulating member according to an embodiment of the present invention;

FIG. 8 is a schematic view of an end plate according to an embodiment of the present invention;

fig. 9 is a side view of an end plate according to an embodiment of the present invention.

Description of reference numerals:

1. an upper cover; 2. a module frame; 21. a base plate; 22. a first side plate; 221. a first side plate groove; 23. a second side plate; 3. an electrical core assembly; 31. a cell body; 4. a liquid-cooled plate; 41. a liquid-cooled tube; 42. A water inlet and outlet; 5. an end cap assembly; 51. an inner insulating member; 52. a bus bar; 53. an outer insulator; 531. a diversion trench; 54. an insulating sheet; 55. an end plate; 551. a closing plate; 5511. closing the groove; 552. a fixing plate; 6. no. two end cover components.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

A battery module structure, as shown in fig. 1 to 9, comprises an upper cover 1, a module frame 2, an electric core component 3, a liquid cooling plate 4, a first end cover component 5 and a second end cover component 6, wherein the template frame is made of aluminum alloy material,

wherein the module frame 2 comprises a bottom plate 21, a first side plate 22 and a second side plate 23, the first side plate 22 is arranged at one end of the bottom plate 21, the second side plate 23 is arranged at the other end of the bottom plate 21 to form the module frame 2 which is integrally U-shaped, the bottom of the electric core assembly 3 is fixedly arranged on the upper surface of the bottom plate 21 through structural adhesive, the liquid cooling plate 4 is fixedly arranged on the top of the electric core assembly 3, the top of the liquid cooling plate 4 is arranged on the upper cover 1 through the structural adhesive, the structural adhesive has insulating property, the structural adhesive with higher viscosity is selected during use, and the fluidity in the implementation process is reduced,

and the both ends of upper cover 1 are fixed connection respectively to curb plate 22 No. one, curb plate 23 No. two, and end cover subassembly 5 No. one is installed to one side of module frame 2, and end cover subassembly 6 No. two is installed to the opposite side of module frame 2. The connection mode between the bottom plate 21 and the first side plate and the second side plate 23 is welding, bolting or riveting;

the battery core assembly 3 comprises a plurality of battery core bodies 31, the battery core bodies 31 are sequentially arranged into two layers to form the battery core assembly 3, the length of the battery core assembly 3 is matched with that of the bottom plate 21, the width of the battery core assembly is matched with that of the first side plate 22, the first battery core body 31 and the second battery core body 31 are arranged in a staggered mode, compared with the prior art, the staggered mode adopts a scheme of arranging a plurality of short-sized battery cores side by side, the module grouping process and the number of parts are simplified, the space utilization rate is higher, the module thermal runaway extension design is facilitated, opposite battery core thermal runaway caused by spraying after certain battery core thermal runaway can be avoided, and the safety is higher;

the first side plate 22 and the second side plate 23 are identical in structure, a first side plate 22 groove is formed in the inner side of the top of the first side plate 22, a second side plate 23 groove is formed in the inner side of the top of the second side plate 23, and the first side plate 22 groove and the second side plate 23 groove are L-shaped grooves; the first side plate 22 groove and the second side plate 23 groove are used for assembling and avoiding the upper cover 1, the size is prevented from exceeding the boundary, the first side plate 22 and the second side plate 23 are respectively provided with a weight reducing through groove, the weight reducing through grooves enable the first side plate 22 and the second side plate 23 to form a central control structure, the weight is light, and the utilization energy density is improved.

The surface of the liquid cooling plate 4 is provided with a plurality of liquid cooling pipes 41, the middle part of the liquid cooling plate 4 is provided with two water inlets and outlets 42, the liquid cooling pipes 41 are communicated to the two water inlets and outlets 42, and the liquid cooling plate 4 is provided with a heat conduction material for filling the gap between the cold plate and the electric core and reducing the temperature difference of the module in the whole life cycle.

The first end cover assembly 5 and the second end cover assembly 6 are identical in structure, the first end cover assembly 5 is formed by sequentially connecting an inner insulating piece 51, a bus bar 52, an outer insulating piece 53, an insulating piece 54 and an end plate 55 from inside to outside, the inner insulating piece 51 is formed by injection molding of high-temperature-resistant materials, the integrity of the battery after thermal runaway due to abuse of the battery is ensured,

interior insulator 51 is equipped with the interior honeycomb holes corresponding with electric core body 31 quantity and position, a width for to electric core body 31 carries on spacingly, and make a plurality of telecommunications body form wholly, promote the rigidity of module, and interior insulator 51 has the effect of fixed busbar 52, outer insulator 53 is equipped with the outer honeycomb holes corresponding with electric core body 31 quantity and position, outer insulator 53 has high temperature resistance and insulating nature, avoid appearing drawing the arc accident between busbar 52 and end plate 55, promote holistic security, busbar 52 is equipped with the collection hole corresponding with electric core body 31 quantity and position.

The busbar 52 is formed by stamping a copper bar, and the plurality of cell bodies 31 are connected to the busbar 52 by laser welding, riveting or bolting, so that series-parallel connection among the plurality of cell bodies 31 is realized.

The inner surface of the circumference of the outer honeycomb hole of the outer insulating member 53 is provided with a diversion trench 531, so that the shaping and the eruption of high-temperature gas after the thermal runaway of the cell body 31 are realized, and the safety is higher, as shown in fig. 7.

The cross section of the end plate 55 is of a T-shaped structure and comprises a closing plate 551 and a fixing plate 552, the fixing plate 552 is vertically mounted to the middle of the closing plate 551 to form the end plate 55, the closing plate 551 of the end plate 55 is connected with an insulating sheet 54 to realize the connection of the end plate 55 and the insulating sheet 54, a closing groove 5511 is formed in the top of the closing plate 551, and the closing groove 5511 is also an L-shaped groove. The closing plate 551 passes through welding process and module frame 2, upper cover 1 forms the confined cavity, be equipped with a plurality of exhaust holes on the closing plate 551, be used for module thermal runaway back pressure release exhaust, promote the security of module, it can place inside outside foreign matter enters the module to paste insulating piece 54 in the closing plate 551, if the module is because of abusing the thermal runaway back simultaneously, high temperature can melt insulating piece 54, realize gaseous emission and pressure release, end plate 55 upside design L shape recess, be used for upper cover 1 assembly to dodge, avoid the size to exceed the boundary requirement.

The upper cover 1 is provided with water inlet and outlet holes corresponding to the two water inlet and outlet holes 42, and the upper cover 1 is made of high-temperature resistant material, so that the upper cover 1 can be effectively prevented from being damaged after the battery is out of control due to abuse heat, and gas is sprayed upwards; if the battery package system does not have the requirement to thermal runaway gas eruption direction, can be other materials, reserve liquid cold plate 4 business turn over water hole and the total positive total negative of module and dodge the hole on the upper cover 1, laminate with the recess of reserving above curb plate and the end plate 55 to after the inner structure equipment is accomplished, be connected with module frame 2, end plate 55 through welding or riveting or bonding process, play the effect of protection to the module inner structure.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a battery module structure which characterized in that: comprises an upper cover, a module frame, an electric core component, a liquid cooling plate, a first end cover component and a second end cover component,

2. The battery module structure according to claim 1, wherein: the electric core assembly comprises a plurality of electric core bodies, the electric core bodies are sequentially arranged into two layers to form the electric core assembly, the length of the electric core assembly is matched with that of the bottom plate, the width of the electric core assembly is matched with that of the first side plate, and the first layer electric core body and the second layer electric core body are arranged in a staggered mode.

3. The battery module structure according to claim 1, wherein: the first side plate and the second side plate have the same structure, a first side plate groove is formed in the inner side of the top of the first side plate, a second side plate groove is formed in the inner side of the top of the second side plate, and the first side plate groove and the second side plate groove are both L-shaped grooves; no. one curb plate and No. two curb plates all are equipped with and subtract heavy logical groove.

4. The battery module structure according to claim 1, wherein: the surface of the liquid cooling plate is provided with a plurality of liquid cooling pipes, the middle part of the liquid cooling plate is provided with two water inlets and two water outlets, and the plurality of liquid cooling pipes are communicated to the two water inlets and the two water outlets.

5. The battery module structure according to claim 1, wherein: the first end cover assembly and the second end cover assembly are identical in structure, the first end cover assembly is formed by sequentially connecting an inner insulating piece, a busbar, an outer insulating piece, an insulating piece and an end plate from inside to outside, the inner insulating piece is provided with inner honeycomb holes corresponding to the number and the positions of the electric core bodies, the outer insulating piece is provided with outer honeycomb holes corresponding to the number and the positions of the electric core bodies, and the busbar is provided with a junction hole corresponding to the number and the positions of the electric core bodies.

6. The battery module structure according to claim 5, wherein: the busbar uses copper bar stamping forming, connects to the busbar through laser welding or riveting or bolt between a plurality of electric core bodies.

7. The battery module structure according to claim 5, wherein: the inner surface of the circumference of the outer honeycomb hole of the outer insulating part is provided with a diversion trench.

8. The battery module structure according to claim 5, wherein: the cross section of the end plate is of a T-shaped structure and comprises a closed plate and a fixed plate, the fixed plate is vertically arranged in the middle of the closed plate to form the end plate, the closed plate of the end plate is connected with an insulating sheet to realize the connection of the end plate and the insulating sheet, a closed groove is arranged at the top of the closed plate, and the closed groove is also an L-shaped groove.

9. The battery module structure according to claim 1, wherein: the upper cover is provided with water inlet and outlet holes corresponding to the two water inlet and outlet holes.