CN219106291U - Battery module and battery - Google Patents

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module and a battery. The battery module comprises a plurality of battery cell groups, an intermediate liquid cooling plate, an end plate, a liquid cooling side plate and a liquid cooling bottom plate. Each cell group comprises a plurality of cells arranged in a row. The middle liquid cooling plate is arranged between two adjacent cell groups, the two ends of the middle liquid cooling plate are provided with middle connecting pieces, and cooling liquid flows through the middle liquid cooling plate. The two ends of each cell group are provided with end plates, the two end plates at each end of each two adjacent cell groups are arranged side by side, and the middle connecting piece is positioned between the two end plates arranged side by side and is respectively connected with the two end plates. The liquid cooling curb plate sets up in the outside of electricity core group, and liquid cooling curb plate both ends have outside connecting piece, and outside connecting piece and adjacent end plate are connected, and the liquid cooling curb plate circulation has the coolant liquid. The liquid cooling bottom plate is arranged at the bottom of the battery cell group, and cooling liquid is circulated in the liquid cooling bottom plate. The battery module has good cooling effect and stable structure.

Description

Battery Modules and Batteries

technical field

The utility model relates to the field of battery technology, in particular to a battery module and a battery.

Background technique

With the popularity of electric vehicles, the charging rate, service life and safety of batteries have attracted more and more attention from users. A certain amount of heat will be generated during battery charging and discharging, especially for high-rate charging and discharging batteries. If the internal heat dissipation of the battery is not timely and the heat dissipation efficiency is low, it is easy to cause serious consequences such as thermal runaway of the battery cell or internal short circuit. Therefore, a thermal management system is usually designed inside the battery to cool down the battery cell.

In the existing battery module with multiple rows of battery packs, the liquid cooling plate between two adjacent rows of battery packs is bonded to the side of the battery pack with thermally conductive structural adhesive. The battery module assembled in this way Group, limited by the structural form of the liquid-cooled side plate, the assembly stability is poor.

Therefore, there is an urgent need to propose battery modules and batteries to solve the above problems.

Utility model content

An object of the present invention is to provide a battery module with good cooling effect and stable structure.

For this purpose, the utility model adopts the following technical solutions:

Battery modules, including:

A plurality of cell groups, each of which includes a plurality of cells arranged in rows;

An intermediate liquid cold plate, the intermediate liquid cold plate is arranged between two adjacent battery packs, the two ends of the intermediate liquid cold plate have intermediate connectors, and the cooling liquid circulates in the intermediate liquid cold plate ;

End plates, the two ends of each of the battery core groups are provided with the end plates, the two end plates at each end of two adjacent battery core groups are arranged side by side, and the intermediate connector is located between two side by side The set end plates are connected to the two end plates respectively;

A liquid-cooled side plate, the liquid-cooled side plate is arranged on the outside of the battery pack, and the two ends of the liquid-cooled side plate have outer connectors, and the outer connectors are connected to the adjacent end plates, so Coolant is passed through the flow of the liquid-cooled side plate;

A liquid-cooled bottom plate, the liquid-cooled bottom plate is arranged at the bottom of the battery pack, and cooling liquid circulates in the liquid-cooled bottom plate.

Optionally, both the intermediate liquid-cooled plate and the liquid-cooled side plate include a side-plate main body, and liquid-cooled flow channels are arranged on the side-plate main body.

Optionally, two connecting parts are provided on the intermediate connecting part, and one connecting part is provided on the outer connecting part.

Optionally, two sides of the end plate are provided with limiting installation grooves, and the connecting part can be inserted into the limiting installation grooves.

Optionally, the connecting portion is a plate body arranged parallel to the end plate, and the limiting installation groove is opened on the outer surface of the end plate.

Optionally, a pipe joint is provided on the housing, and the housing has a socket cavity, the socket cavity communicates with the pipe joint, and the socket cavity communicates with the liquid cooling channel.

Optionally, both ends of the main body of the side plate are provided with plug-in parts, and the plug-in parts are plugged into the plug-in cavity.

Optionally, thermally conductive structural glue is provided between the liquid-cooled side plate, the liquid-cooled bottom plate and the cell pack, foam frames are provided around the liquid-cooled bottom plate, and the liquid-cooled bottom plate and the The thermally conductive structural glue between the cell groups is located in the foam frame.

Another object of the present invention is to provide a battery, which has a good heat dissipation effect and a stable and reliable battery structure.

For this purpose, the utility model adopts the following technical solutions:

A battery, the battery includes a casing and the above-mentioned battery module.

Optionally, a fixed plate is provided on the liquid-cooled side plate, the fixed plate extends along the length direction of the liquid-cooled side plate and is perpendicular to the liquid-cooled side plate, and the bottom of the box is provided with The first support beam, the fixing plate is set on the first support beam and fixedly connected with the first support beam.

Optionally, a first assembly hole is provided along the vertical direction of the end plate, an avoidance groove is arranged at the bottom of the end plate, a second support beam is arranged in the avoidance groove, and a second support beam is arranged on the second support beam. A second assembly hole is provided, the first assembly hole is connected to the second assembly hole through a fixing pin, and the second support beam is connected to the box body.

Beneficial effect:

The battery module provided by the utility model realizes the cooling of the two sides and the three surfaces of the bottom surface of the battery pack by setting the middle liquid cooling plate, the liquid cooling side plate and the liquid cooling bottom plate, and the heat dissipation effect of the battery module is significantly improved, so that the battery The cycle life and safety performance are effectively guaranteed. Since the battery module is equipped with multiple rows of batteries, the width of the battery module is increased. By setting the intermediate liquid cold plate and the intermediate connector between the adjacent battery packs, and the intermediate connector is located at the two ends arranged side by side. The plates are connected to both end plates, which can increase the overall structural strength of the battery module. At the same time, the group assembly of the battery modules is realized by setting the intermediate connector and the outer connector, and the structure is stable.

The battery provided by the utility model is provided with a liquid-cooled side plate on the outside of the battery pack, an intermediate liquid-cooled plate is set between adjacent battery packs, and a liquid-cooled bottom plate is set at the bottom of the battery pack, so that each row of battery packs The heat dissipation on the two side surfaces and the three sides of the bottom surface has a good heat dissipation effect. The connection between the middle liquid-cooled plate and the end plate is realized through the intermediate connector, and at the same time, the connection between the liquid-cooled side plate and the end plate is realized through the outer connector, so that the assembly of the battery module is reliable, the structure is stable, and the battery’s pressure resistance and deformation resistance are relatively high. powerful.

Description of drawings

Fig. 1 is the structural representation of the battery module provided by the utility model;

Fig. 2 is a schematic structural view of the intermediate connector provided by the utility model;

Fig. 3 is a schematic structural view of the outer connector provided by the utility model;

Fig. 4 is the structural representation of the end plate provided by the utility model;

Fig. 5 is an exploded view of the liquid-cooled side plate provided by the utility model;

Fig. 6 is a partial structural schematic diagram of the main body of the side plate provided by the utility model;

Fig. 7 is a schematic cross-sectional view of the liquid-cooled side plate provided by the present invention;

Fig. 8 is an exploded view of the outer connector provided by the utility model;

Fig. 9 is an exploded view of the battery module provided by the present invention;

Fig. 10 is a schematic diagram of a partial structure of the battery provided by the present invention.

In the picture:

1000, battery module; 100, intermediate connector; 110, side plate main body; 111, partition; 112, liquid cooling flow channel; 113, fixed plate; 114, socket part; Connector; 122, shell; 123, socket cavity; 124, connecting part; 200, liquid cooling bottom plate; 210, liquid inlet; 300, end plate; 310, limit installation groove; 320, first assembly hole; 330, avoidance Groove; 400, battery cell; 500, thermal conductive structural adhesive; 600, foam frame; 700, insulation sheet; 800, bus bar; 2000, box body.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Wherein, the terms "first position" and "second position" are two different positions, and "above", "above" and "above" the first feature on the second feature include that the first feature is on the second feature. Directly above and obliquely above, or simply means that the first feature level is higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

Referring to FIG. 1 , the present embodiment provides a battery module 1000 , including a plurality of cell packs, a middle liquid-cooled plate, an end plate 300 , a liquid-cooled side plate and a liquid-cooled bottom plate 200 . Each cell pack includes a plurality of cells 400 arranged in rows. The middle liquid cold plate is arranged between two adjacent battery packs, the two ends of the middle liquid cold plate have intermediate connectors 100, and the cooling liquid circulates in the middle liquid cold plate. Both ends of each cell group are provided with end plates 300, and the two end plates 300 at each end of two adjacent cell groups are arranged side by side, and the intermediate connector 100 is located between the two side-by-side end plates 300 and is respectively connected with The two end plates 300 are connected. The liquid-cooled side plate is arranged on the outside of the cell pack, and the two ends of the liquid-cooled side plate have outer connectors 120 connected to the adjacent end plates 300 , and coolant flows through the liquid-cooled side plate. The liquid-cooled bottom plate 200 is disposed at the bottom of the cell pack, and cooling liquid circulates in the liquid-cooled bottom plate 200 .

The above-mentioned battery module 1000 realizes the cooling of the two sides and the three bottom surfaces of the battery pack by setting the middle liquid cooling plate, the liquid cooling side plate and the liquid cooling bottom plate 200, and the heat dissipation effect of the battery module 1000 is significantly improved, so that the battery The cycle life and safety performance are effectively guaranteed. Since the battery module 1000 is provided with a plurality of cell groups, the width of the battery module 1000 is increased, and an intermediate liquid cold plate and an intermediate connector 100 are arranged between adjacent cell groups, and the intermediate connectors 100 are located side by side. The two end plates 300 are connected between and with the two end plates 300, which can increase the overall structural strength of the battery module 1000. Assembled, the structure is stable.

Further, referring to FIG. 2 and FIG. 3 , both the intermediate connector 100 and the outer connector 120 are provided with a shell 122 and a connecting portion 124 , and the connecting portion 124 is connected to the end plate 300 . Optionally, one connecting portion 124 is disposed on the outer connecting member 120 , and two connecting portions 124 are disposed on the intermediate connecting member 100 , and the two connecting portions 124 extend in opposite directions and are respectively connected to the end plates 300 on both sides. Optionally, the shell 122 and the connection part 124 can be integrally formed, and the outer connection part 120 can be formed by cutting off a connection part 124 on the middle connection part 100 . Of course, the shell 122 and the connecting portion 124 can also be processed and formed separately. Optionally, the connecting portion 124 and the shell 122 can be connected by welding.

Referring to FIG. 4 , the two sides of the end plate 300 are provided with limiting installation grooves 310 , and the connecting portion 124 can be inserted into the limiting installation grooves 310 . Understandably, the shape of the limiting installation groove 310 is set according to the shape of the connecting portion 124 , and the limiting installation groove 310 can be arranged on the outer end surface of the end plate 300 or can be opened in the end plate 300 .

Referring to FIG. 2 to FIG. 4 , in this embodiment, the connecting portion 124 is a plate body arranged parallel to the end plate 300 , and the limiting installation groove 310 is opened on the outer end surface of the end plate 300 . The plate body is attached to the outer end surface of the end plate 300 and can limit the movement of the end plate 300 in the length direction of the battery module 1000 . Optionally, the plate body and the end plate 300 are fixedly connected through a welded square. The outer connecting piece 120 is provided with a plate body, which is connected with the end plate 300 located outside the cell pack, and the intermediate connecting piece 100 is provided with two plate bodies, which can be connected with the end plates 300 on the left and right sides at the same time. During the assembly process, the limit of the end plate 300 in the length direction of the battery module 1000 can be realized, and on the other hand, it can be connected with the end plate 300, so that the connection of the battery module 1000 is more firm and reliable.

Referring to FIG. 5 to FIG. 7 , both the middle liquid-cooled plate and the liquid-cooled side plate include a side plate main body 110 , on which a liquid-cooled flow channel 112 is arranged, and the shell 122 is connected to the side plate main body 110 . Specifically, the side plate main body 110 has a cavity, and a plurality of barriers 111 extending in the horizontal direction are arranged in the cavity, and the plurality of barriers 111 divide the cavity into a plurality of liquid cooling channels 112, and the liquid cooling channels 112 The flow rate of the internal coolant increases sequentially from the bottom to the top. Optionally, the barrier 111 extends in the horizontal direction, and the liquid cooling channel 112 is arranged horizontally. In this embodiment, the distance between adjacent barriers 111 gradually increases from the bottom to the top of the side plate main body 110 , so as to achieve the effect of gradually increasing the flow rate from the bottom to the top. Since the heat at the bottom of the cell pack is mainly dissipated through the liquid-cooled bottom plate 200, increasing the coolant flow rate at the top of the side plate main body 110 can effectively reduce the temperature difference of the cell 400 in the height direction, and realize the overall balanced heat dissipation of the cell 400. Of course, in other embodiments, the arrangement of the liquid-cooling channels 112 can be set as required, which is not specifically limited here. The liquid-cooled side plate and the middle liquid-cooled plate in this embodiment are split type, and the side plate main body 110 and the connector are processed and manufactured separately, so that when the battery module 1000 is assembled, it can be flexibly assembled according to the needs of use, It is applicable to the battery module 1000 provided with one or more battery packs, and the side plate main body 110 arranged on the outside of the battery pack and between two adjacent rows of battery packs adopts the same set of molds, effectively saving design and development costs .

Further, referring to FIG. 5 , the housing 122 is provided with a pipe joint 121 , and the housing 122 has a socket cavity 123 , the socket cavity 123 communicates with the pipe joint 121 , and the socket cavity 123 communicates with the liquid cooling channel 112 . The pipe joint 121 is used for water inlet or outlet to realize the delivery function of cooling liquid.

Further, referring to FIG. 6 to FIG. 8 , both ends of the side plate main body 110 are provided with insertion portions 114 , and the insertion portions 114 are inserted into the insertion cavity 123 . Specifically, a circle of depression is machined on the inner surface of the opening of the housing 122 , and the insertion portion 114 on the side plate main body 110 can match the shape of the depression. Optionally, the side plate main body 110 of the casing 122 can be sealed and connected by means of laser welding or brazing. After the shell 122 and the side plate main body 110 are assembled, the inner wall of the socket cavity 123 is flush with the inner wall of the side plate main body 110 .

Referring to FIG. 9 , a thermally conductive structural adhesive 500 is arranged between the liquid-cooled side plate, the liquid-cooled bottom plate 200 and the cell pack, and the liquid-cooled side plate and the liquid-cooled bottom plate 200 are fixedly connected to the cell pack through the thermally conductive structural adhesive 500 . Optionally, an insulation and heat preservation sheet 700 is disposed between the end plate 300 and the end cell 400 . The insulation sheet 700 is made of a composite material with insulation and heat insulation functions, so as to avoid the problem of excessive temperature difference between the battery cells 400 at the end and the battery cells 400 at the middle.

Optionally, a foam frame 600 is provided around the liquid-cooled bottom plate 200 , and the thermally conductive structural adhesive 500 between the liquid-cooled bottom plate 200 and the cell pack is located in the foam frame 600 . The foam frame 600 can prevent the thermally conductive structural glue 500 at the bottom from overflowing when the module is pressed down, and can also isolate the heat transfer between the bottom of the liquid-cooled side plate and the two sides of the liquid-cooled bottom plate 200 to achieve a certain degree of heat preservation effect.

Referring to FIG. 9 and FIG. 10 , this embodiment also provides a battery, which includes a box body and a plurality of the above-mentioned battery modules 1000 .

The above-mentioned battery is provided with a liquid-cooled side plate on the outside of the battery pack, an intermediate liquid-cooled plate is provided between adjacent battery packs, and a liquid-cooled bottom plate 200 is provided at the bottom of the battery pack, so that each row of battery packs can be placed on two sides. The heat dissipation on the three sides of the side and the bottom has a good heat dissipation effect. The connection between the middle liquid-cooled plate and the end plate 300 is realized through the intermediate connector 100, and at the same time, the connection between the liquid-cooled side plate and the end plate 300 is realized through the outer connector 120, so that the battery module 1000 is assembled reliably, with a stable structure, and the durability of the battery. Strong resistance to compression and deformation.

Further, a fixed plate 113 is provided on the liquid-cooled side plate, and the fixed plate 113 extends along the length direction of the liquid-cooled side plate and is perpendicular to the liquid-cooled side plate. It is erected on the first support beam and fixedly connected with the first support beam. Optionally, a plurality of through holes are arranged at intervals on the fixing plate 113 , and a plurality of threaded holes are correspondingly arranged on the first supporting beam, and the fixing plate 113 is fixedly connected to the first supporting beam by bolts. Optionally, the fixing plate 113 is connected to the side plate main body 110 .

Further, a first assembly hole 320 is provided along the vertical direction of the end plate 300, an avoidance groove 330 is arranged at the bottom of the end plate 300, a second support beam is arranged in the avoidance groove 330, and a second support beam is arranged on the second support beam. As for the assembly hole, the first assembly hole 320 is connected to the second assembly hole through a fixing pin, and the second support beam is connected to the box body. Optionally, the fixing pin may be a long bolt, the second assembly hole is a threaded hole, and the long bolt is screwed through the first assembly hole 320 and the second assembly hole. Optionally, a plurality of end plates 300 can be connected to the second support beam, so that the overall structure is stable and reliable.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. Various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (10)

1. The battery module, its characterized in that includes:

a plurality of cell groups, each of the cell groups comprising a plurality of cells (400) arranged in a row;

the intermediate liquid cooling plate is arranged between two adjacent cell groups, two ends of the intermediate liquid cooling plate are provided with intermediate connecting pieces (100), and cooling liquid flows through the intermediate liquid cooling plate;

the battery cell module comprises end plates (300), wherein the end plates (300) are arranged at two ends of each battery cell group, two end plates (300) at each end of two adjacent battery cell groups are arranged side by side, and the middle connecting piece (100) is positioned between the two end plates (300) arranged side by side and is respectively connected with the two end plates (300);

the liquid cooling side plates are arranged on the outer sides of the battery cell groups, outer side connecting pieces (120) are arranged at two ends of each liquid cooling side plate, the outer side connecting pieces (120) are connected with the adjacent end plates (300), and cooling liquid flows in the liquid cooling side plates;

the liquid cooling bottom plate (200), liquid cooling bottom plate (200) set up the bottom of electric core group, it has the coolant liquid to flow through in liquid cooling bottom plate (200).

2. The battery module according to claim 1, wherein the middle connection member (100) and the outer connection member (120) are each provided with a housing (122) and a connection portion (124), and the connection portion (124) and the end plate (300) are connected.

3. The battery module according to claim 2, wherein two of the connection parts (124) are provided on the intermediate connection member (100), and one of the connection parts (124) is provided on the outer connection member (120).

4. A battery module according to any one of claims 2-3, wherein the intermediate liquid cooling plate and the liquid cooling side plate each comprise a side plate main body (110), a liquid cooling flow passage (112) is provided on the side plate main body (110), and the housing (122) is connected to the side plate main body (110).

5. The battery module according to claim 4, wherein a pipe joint (121) is provided on the housing (122), the housing (122) has a plug cavity (123), the plug cavity (123) is communicated with the pipe joint (121), and the plug cavity (123) is communicated with the liquid cooling flow channel (112).

6. The battery module according to claim 5, wherein both ends of the side plate main body (110) are provided with plug-in portions (114), and the plug-in portions (114) and the plug-in cavities (123) are plugged.

7. The battery module according to claim 1, wherein a heat-conducting structural adhesive (500) is arranged between the liquid-cooling side plate, the liquid-cooling bottom plate (200) and the electric core group, a foam frame (600) is arranged around the liquid-cooling bottom plate (200), and the heat-conducting structural adhesive (500) between the liquid-cooling bottom plate (200) and the electric core group is located in the foam frame (600).

8. A battery, characterized in that the battery comprises a case (2000) and a battery module (1000) according to any one of claims 1-7.

9. The battery according to claim 8, wherein a fixing plate (113) is disposed on the liquid cooling side plate, the fixing plate (113) extends along the length direction of the liquid cooling side plate and is perpendicular to the liquid cooling side plate, a first supporting beam is disposed at the bottom of the box body (2000), and the fixing plate (113) is mounted on the first supporting beam and is fixedly connected with the first supporting beam.

10. The battery according to claim 9, wherein a first assembly hole (320) is provided along a vertical direction of the end plate (300), an avoidance groove (330) is provided at a bottom of the end plate (300), a second support beam is provided in the avoidance groove (330), a second assembly hole is provided on the second support beam, the first assembly hole (320) and the second assembly hole are connected by a fixing pin, and the second support beam is connected with the case (2000).

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