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 module and battery

Technical Field

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

Background

With the popularization of electric vehicles, the charge rate, service life, safety and the like of batteries are receiving attention from users. Certain heat can be generated in the charging and discharging process of the battery, and especially for the battery charged and discharged at high multiplying power, if the heat dissipation inside the battery is not timely, the heat dissipation efficiency is low, and serious consequences such as thermal runaway or internal short circuit of the battery core are easily caused. Therefore, a thermal management system is usually designed in the battery to cool the battery cells.

The existing battery module with multiple rows of battery cell groups, the liquid cooling plates between two adjacent rows of battery cell groups are adhered to the side surfaces of the battery cell groups by using heat conduction structural adhesive, and the battery module assembled in the mode is limited by the structural form of the liquid cooling side plates, so that the assembly stability is poor.

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

Disclosure of Invention

An object of the present utility model is to provide a battery module having a good cooling effect and a stable structure.

To achieve the purpose, the utility model adopts the following technical scheme:

a battery module, comprising:

a plurality of battery cell groups, wherein each battery cell group comprises a plurality of battery cells 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, and cooling liquid flows through the intermediate liquid cooling plate;

the two ends of each cell group are provided with end plates, the two end plates at each end of 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 side plate is arranged at the outer side of the battery cell group, outer side connecting pieces are arranged at two ends of the liquid cooling side plate and are connected with the adjacent end plates, and cooling liquid is filled in the liquid cooling side plate;

the liquid cooling bottom plate, the liquid cooling bottom plate sets up the bottom of electric core group, it has the coolant liquid to circulate in the liquid cooling bottom plate.

Optionally, the intermediate liquid cooling plate and the liquid cooling side plate each comprise a side plate main body, and a liquid cooling runner is arranged on the side plate main body.

Optionally, two connecting parts are arranged on the middle connecting piece, and one connecting part is arranged on the outer connecting piece.

Optionally, limiting mounting grooves are formed in two sides of the end plate, and the connecting portion can be inserted into the limiting mounting grooves.

Optionally, the connecting portion is parallel to the plate body that the end plate set up, spacing mounting groove sets up in the surface of end plate.

Optionally, a pipe joint is arranged on the shell, the shell is provided with an inserting cavity, the inserting cavity is communicated with the pipe joint, and the inserting cavity is communicated with the liquid cooling runner.

Optionally, the both ends of curb plate main part all are provided with grafting portion, grafting portion with the grafting chamber is pegged graft.

Optionally, a heat-conducting structural adhesive is arranged between the liquid cooling side plate, the liquid cooling bottom plate and the electric core group, a foam frame is arranged around the liquid cooling bottom plate, and the heat-conducting structural adhesive between the liquid cooling bottom plate and the electric core group is positioned in the foam frame.

Another object of the present utility model is to provide a battery with good heat dissipation effect, and a stable and reliable battery structure.

To achieve the purpose, the utility model adopts the following technical scheme:

the battery comprises a box body and the battery module.

Optionally, be provided with the fixed plate on the liquid cooling curb plate, the fixed plate is followed the length direction of liquid cooling curb plate extends and with the liquid cooling curb plate sets up perpendicularly, the bottom of box is provided with first supporting beam, the fixed plate take in on the first supporting beam and with first supporting beam fixed connection.

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

The beneficial effects are that:

according to the battery module provided by the utility model, the cooling of the two side surfaces and the bottom surface of the battery cell group is realized by arranging the intermediate liquid cooling plate, the liquid cooling side plate and the liquid cooling bottom plate, so that the heat dissipation effect of the battery module is obviously improved, and the cycle life and the safety performance of the battery are effectively ensured. Because battery module is provided with multirow electric core, battery module's width increases to some extent, through setting up intermediate liquid cooling board and intermediate connection spare between adjacent electric core group, and intermediate connection spare is located between two end plates that set up side by side and all is connected with two end plates, can increase battery module overall structure intensity, simultaneously, realizes battery module's assembly in groups through setting up intermediate connection spare and outside connecting piece, and the structure is firm.

According to the battery provided by the utility model, the liquid cooling side plates are arranged on the outer sides of the battery cell groups, the middle liquid cooling plate is arranged between the adjacent battery cell groups, and the liquid cooling bottom plate is arranged at the bottom of the battery cell, so that heat dissipation of each battery cell group on three sides of the two sides and the bottom surface is realized, and a good heat dissipation effect is achieved. The middle liquid cooling plate and the end plate are connected through the middle connecting piece, and meanwhile, the liquid cooling side plate and the end plate are connected through the outer connecting piece, so that the battery module is reliable in assembly, stable in structure and strong in pressure resistance and deformation resistance of the battery.

Drawings

Fig. 1 is a schematic view of a battery module according to the present utility model;

FIG. 2 is a schematic view of an intermediate connector according to the present utility model;

FIG. 3 is a schematic view of an outer connector according to the present utility model;

FIG. 4 is a schematic view of the structure of an end plate provided by the present utility model;

FIG. 5 is an exploded view of a liquid cooled side panel provided by the present utility model;

FIG. 6 is a schematic view of a part of the side plate body according to the present utility model;

FIG. 7 is a schematic cross-sectional view of a liquid cooled side plate provided by the present utility model;

FIG. 8 is an exploded view of an outboard connector provided by the present utility model;

fig. 9 is an exploded view of the battery module provided by the present utility model;

fig. 10 is a schematic view of a partial structure of a battery provided by the present utility model.

In the figure:

1000. a battery module; 100. an intermediate connection; 110. a side plate main body; 111. a baffle; 112. a liquid cooling runner; 113. a fixing plate; 114. a plug-in part; 120. an outer connecting member; 121. a pipe joint; 122. a housing; 123. a plug cavity; 124. a connection part; 200. a liquid-cooled bottom plate; 210. a liquid inlet; 300. an end plate; 310. a limit mounting groove; 320. a first fitting hole; 330. an avoidance groove; 400. a battery cell; 500. a heat conducting structural adhesive; 600. foam frames; 700. insulating heat preservation sheets; 800. a busbar; 2000. a box body.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Referring to fig. 1, the present embodiment provides a battery module 1000 including a plurality of battery cells, an intermediate liquid cooling plate, an end plate 300, a liquid cooling side plate, and a liquid cooling bottom plate 200. Each cell group includes a plurality of cells 400 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 100, and cooling liquid flows through the middle liquid cooling plate. The two ends of each cell group are respectively provided with an end plate 300, the two end plates 300 at each end of the two adjacent 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 curb plate sets up in the outside of electric core group, and liquid cooling curb plate both ends have outside connecting piece 120, and outside connecting piece 120 and adjacent end plate 300 are connected, and the circulation has the coolant liquid in the liquid cooling curb plate. The liquid cooling bottom plate 200 is arranged at the bottom of the battery cell group, and cooling liquid flows in the liquid cooling bottom plate 200.

Above-mentioned battery module 1000 realizes the cooling of two sides and the three faces in bottom surface of electric core group through setting up intermediate liquid cooling board, liquid cooling curb plate and liquid cooling bottom plate 200, and the radiating effect of battery module 1000 obtains obviously promoting, makes the cycle life and the security performance of battery obtain effective guarantee. Because the battery module 1000 is provided with a plurality of electric core groups, the width of battery module 1000 increases to some extent, through setting up intermediate liquid cooling board and intermediate connection spare 100 between adjacent electric core group, and intermediate connection spare 100 is located between two end plates 300 that set up side by side and all is connected with two end plates 300, can increase battery module 1000 overall structure intensity, simultaneously, through setting up intermediate connection spare 100 and outside connecting piece 120 and realize battery module 1000's group assembly, the structure is firm.

Further, referring to fig. 2 and 3, the intermediate 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 is connected with the end plate 300. Optionally, one connecting portion 124 is provided on the outer connecting member 120, two connecting portions 124 are provided on the middle connecting member 100, and the extending directions of the two connecting portions 124 are opposite, and the two connecting portions are respectively connected with the end plates 300 on two sides. Alternatively, the outer shell 122 and the connecting portion 124 may be integrally formed, and the outer connecting member 120 may be formed by cutting one connecting portion 124 of the intermediate connecting member 100. Of course, the housing 122 and the connecting portion 124 may be formed separately, alternatively, the connecting portion 124 and the housing 122 may be connected by welding.

Referring to fig. 4, both sides of the end plate 300 are provided with a limit mounting groove 310, and the connection portion 124 can be inserted into the limit mounting groove 310. It is to be understood that the shape of the limit mounting groove 310 is set according to the shape of the connecting portion 124, and the limit mounting groove 310 may be disposed on the outer end surface of the end plate 300 or may be formed in the end plate 300.

Referring to fig. 2 to 4, in the present embodiment, the connecting portion 124 is a plate body disposed parallel to the end plate 300, and the limiting mounting groove 310 is formed on an outer end surface of the end plate 300. The plate body is attached to the outer end surface of the end plate 300, and movement of the end plate 300 in the longitudinal direction of the battery module 1000 can be restricted. Alternatively, the plate body and the end plate 300 are fixedly coupled by a welded square shape. The outside connecting piece 120 is provided with a plate body and is connected with the end plate 300 located the outside of the battery cell group, and the middle connecting piece 100 is provided with two plate bodies, so that the two plate bodies can be connected with the end plates 300 on the left side and the right side simultaneously, and the plate bodies can realize limit of the end plates 300 in the length direction of the battery module 1000 in the assembly process, and on the other hand, the two plate bodies can be connected with the end plates 300, so that the connection of the battery module 1000 is firmer and more reliable.

Referring to fig. 5 to 7, the intermediate liquid cooling plate and the liquid cooling side plate each include a side plate main body 110, a liquid cooling flow passage 112 is provided on the side plate main body 110, and a housing 122 is connected to the side plate main body 110. Specifically, the side plate main body 110 has a cavity, in which a plurality of barriers 111 extending in the horizontal direction are provided, the plurality of barriers 111 divide the cavity into a plurality of liquid cooling channels 112, and the flow rate of the cooling liquid in the liquid cooling channels 112 increases sequentially from bottom to top. Alternatively, the barrier 111 extends in a horizontal direction, and the liquid cooling flow passage 112 is horizontally disposed. In the present embodiment, the interval between the adjacent baffles 111 gradually increases from the bottom to the top of the side plate main body 110, thereby achieving the effect of gradually increasing the bottom-to-top flow rate. Because the heat at the bottom of the battery cell group is mainly dissipated through the liquid cooling bottom plate 200, increasing the flow of the cooling liquid at the top of the side plate main body 110 can effectively reduce the temperature difference of the battery cell 400 in the height direction, and realize the overall balanced heat dissipation of the battery cell 400. Of course, in other embodiments, the liquid cooling channels 112 may be arranged according to need, and are not limited herein. The liquid cooling side plate and the middle liquid cooling plate in this embodiment are split, and the side plate main body 110 and the connecting piece are respectively manufactured, so that when the battery module 1000 is assembled, the battery module 1000 can be flexibly assembled according to use requirements, the battery module 1000 provided with one or more battery cell groups is applicable, and the side plate main body 110 arranged outside the battery cell groups and between two adjacent battery cell groups adopts the same set of die, so that design and development costs are effectively saved.

Further, referring to fig. 5, a pipe joint 121 is disposed on the housing 122, the housing 122 has a plugging cavity 123, the plugging cavity 123 communicates with the pipe joint 121, and the plugging cavity 123 communicates with the liquid cooling flow passage 112. The pipe joint 121 is used for water inlet or water outlet, and realizes the conveying function of the cooling liquid.

Further, referring to fig. 6 to 8, both ends of the side plate main body 110 are provided with the insertion portion 114, and the insertion portion 114 and the insertion cavity 123 are inserted. Specifically, a circle of recess is machined on the inner side surface of the opening of the housing 122, and the plugging portion 114 on the side plate main body 110 can be matched with the shape of the recess. Alternatively, the side panel bodies 110 of the housing 122 may be hermetically connected by laser welding or brazing, or the like. After the housing 122 and the side plate main body 110 are assembled, the inner wall of the insertion cavity 123 is flush with the inner wall of the side plate main body 110.

Referring to fig. 9, a heat conductive structural adhesive 500 is disposed between the liquid cooling side plate, the liquid cooling bottom plate 200 and the battery cell group, and the liquid cooling side plate and the liquid cooling bottom plate 200 are fixedly connected with the battery cell group through the heat conductive structural adhesive 500. Optionally, an insulating thermal insulation sheet 700 is disposed between the end plate 300 and the end cell 400. The insulating sheet 700 is made of a composite material with insulating and heat-insulating functions, so that the problem of overlarge temperature difference between the end cell 400 and the middle cell 400 is avoided.

Optionally, a foam frame 600 is disposed around the liquid cooling base plate 200, and the heat conductive structural adhesive 500 between the liquid cooling base plate 200 and the electric core group is located in the foam frame 600. The foam frame 600 can prevent the bottom heat conduction structural adhesive 500 from overflowing outwards when the module is pressed downwards, and simultaneously can isolate heat transfer between the bottom of the liquid cooling side plate and two sides of the liquid cooling bottom plate 200, so that a certain heat preservation effect is achieved.

Referring to fig. 9 and 10, the present embodiment also provides a battery including a case and a plurality of the above-described battery modules 1000.

According to the battery, the liquid cooling side plates are arranged on the outer sides of the battery cell groups, the middle liquid cooling plate is arranged between the adjacent battery cell groups, meanwhile, the liquid cooling bottom plate 200 is arranged at the bottom of each battery cell group, heat dissipation of each battery cell group on the three sides of the two sides and the bottom surface is achieved, and good heat dissipation effect is achieved. The connection of the middle liquid cooling plate and the end plate 300 is realized through the middle connecting piece 100, and meanwhile, the connection of the liquid cooling side plate and the end plate 300 is realized through the outer connecting piece 120, so that the battery module 1000 is reliable in assembly, stable in structure and strong in pressure resistance and deformation resistance of the battery.

Further, a fixing plate 113 is arranged 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 arranged at the bottom of the box 2000, and the fixing plate 113 is erected on the first supporting beam and is fixedly connected with the first supporting beam. Optionally, a plurality of through holes are formed in the fixed plate 113 at intervals, a plurality of threaded holes are correspondingly formed in the first supporting beam, and the fixed plate 113 is fixedly connected with the first supporting beam through bolts. Alternatively, the fixing plate 113 is connected to the side plate main body 110.

Further, a first assembly hole 320 is formed along the vertical direction of the end plate 300, an avoidance groove 330 is formed in the bottom of the end plate 300, a second support beam is arranged in the avoidance groove 330, a second assembly hole is formed in the second support beam, the first assembly hole 320 is connected with the second assembly hole through a fixing pin, and the second support beam is connected with the box body. Alternatively, the fixing pin may be a long bolt, and the second assembly hole may be a screw hole, and the long bolt is screwed through the first assembly hole 320 and the second assembly hole. Alternatively, a plurality of end plates 300 may be attached to the second support beam, so that the overall structure is stable and reliable.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

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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