CN212874588U

CN212874588U - Battery cell module and battery pack

Info

Publication number: CN212874588U
Application number: CN202021673886.3U
Authority: CN
Inventors: 黄明高; 廖宇梨; 刘华俊; 阎明瀚; 江吉兵
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-04-02
Anticipated expiration: 2030-08-12

Abstract

The utility model belongs to the technical field of the battery package. Specifically disclosed are a battery cell module and a battery pack. The battery cell module comprises a body and end plates arranged at two ends of the body, wherein grooves are formed in the bottoms of the end plates. The battery cell module can be installed in the shell, the bottom of the end plate is connected with the shell, the shell is provided with a liquid cooling plate used for cooling the battery cell module, and the liquid cooling plate penetrates through the groove and forms a gap with the end plate. Because the bottom of end plate sets up the recess, reduced the area of contact of end plate with the casing to reduced the heat of end plate to the casing transmission, be favorable to reducing the both ends of electric core module and the difference in temperature of mid portion. A gap is formed between the cooling plate and the end plate. The heat transfer between end plate and the liquid cooling board has been kept off, has further reduced the both ends of electric core module and the difference in temperature of mid portion. The battery pack comprises the battery cell module. The influence of the end plates on the heat dissipation capacity of the two ends of the battery cell module is reduced, and the consistency of the temperature of the single battery cells in the battery cell module is favorably realized.

Description

Battery cell module and battery pack

Technical Field

The utility model relates to a battery package technical field especially relates to an electricity core module and battery package.

Background

The battery package has electric core module and carries out the liquid cooling board of cooling to electric core module as common power battery, its casing internally mounted. Wherein aluminium system end plate is installed at electric core module both ends to improve the structural rigidity of electric core module and the stability of monomer electricity core.

In conventional battery package, the end plate generally contacts with the inner wall of casing and liquid cooling board simultaneously, and the electric core that is close to the end plate in the electric core module can also directly give the end plate with heat transfer except through the heat dissipation of liquid cooling board, and the end plate is again with heat transfer for casing or liquid cooling board and dispel the heat. Make the both ends of electric core module faster than the mid portion heat dissipation to lead to electric core module heat dissipation inhomogeneous, the temperature of each part differs greatly, is unfavorable for the thermal management of electric core module.

Therefore, a battery cell module and a battery pack are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electricity core module to solve current electric core module heat dissipation inhomogeneous, the great problem of monomer electricity core difference in temperature.

To achieve the purpose, the technical proposal adopted by the utility model is that:

a battery cell module comprises a body and end plates arranged at two ends of the body, wherein the bottom of each end plate is provided with a groove; the battery cell module can be installed in the shell, the bottom of the end plate is connected with the shell, the shell is provided with a liquid cooling plate for cooling the battery cell module, and the liquid cooling plate penetrates through the groove and forms a gap between the end plates.

Preferably, an insulating plate is sandwiched between the end plate and the body.

Preferably, the insulating plate is provided with lightening holes.

Preferably, the end plate is configured with a plurality of through holes extending in a height direction of the end plate and penetrating both ends of the end plate in the height direction thereof.

Preferably, the end plate is fixedly connected to a cross member of the housing.

Preferably, the end plate is further provided with a through hole extending along the height direction of the end plate, the cross beam is correspondingly provided with a threaded hole, and a bolt can penetrate through the corresponding through hole and is in threaded connection with the threaded hole.

Another object of the utility model is to provide a battery pack to it is inhomogeneous to solve current electric core module heat dissipation, the great problem of monomer electricity core difference in temperature.

the utility model provides a battery pack, includes the casing, covers fit the apron of casing, install in liquid cooling board and foretell electricity core module in the casing.

Preferably, the liquid cooling plate comprises a water inlet section, a liquid cooling section and a water outlet section which are sequentially communicated; the liquid cooling section is used for cooling the battery cell module, the crossbeam of casing set up with the recess is just to the constant head tank that sets up, the section of intaking or play water section pass by the recess with the constant head tank encloses the space of establishing wearing to establish jointly and establish, and the joint in the constant head tank.

Preferably, the depth of the positioning groove is equal to the thickness of the water inlet section or the thickness of the water outlet section.

Preferably, one end of the water inlet section or the water outlet section is provided with a fixing part, and the fixing part is provided with a positioning hole for fixing the liquid cooling plate.

The utility model has the advantages that:

the utility model discloses an electricity core module includes body and end plate. The bottom of end plate is connected with the casing, because the recess is seted up to the bottom of end plate, has reduced the area of contact of end plate with the casing to reduced the end plate and to casing heat transfer, be favorable to reducing the both ends of electric core module and the difference in temperature of mid portion, makeed the temperature of electric core module more balanced. Furthermore, a gap is formed between the cooling plate and the end plate in the housing, i.e., the liquid cooling plate is not in contact with the end plate. The heat transfer between end plate and the liquid cooling board has been kept off, has further reduced the both ends of electric core module and the difference in temperature of mid portion. Through set up the recess at the end plate, reduced the influence of end plate to the heat dissipation capacity at electric core module both ends, be favorable to realizing the uniformity of monomer electric core temperature in the electric core module.

The utility model discloses a battery package includes above-mentioned electricity core module. Through set up the recess at the end plate, reduced the influence of end plate to the heat dissipation capacity at electric core module both ends, be favorable to realizing the uniformity of monomer electric core temperature in the electric core module.

Drawings

Fig. 1 is a schematic view of an assembly structure inside a housing of a battery pack according to an embodiment of the present invention;

fig. 2 is an exploded view of an assembly structure of a battery pack according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of a battery cell module according to an embodiment of the present invention;

fig. 4 is a schematic end view of an end plate provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an end plate provided in an embodiment of the present invention;

fig. 6 is a top view of an end plate provided by an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a housing according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present invention.

The component names and designations in the drawings are as follows:

10. a battery pack;

1. a battery cell module; 11. a body; 12. an end plate; 121. a groove; 122. a through hole; 123. a through hole;

2. a liquid-cooled plate; 21. a liquid cooling section; 22. a water inlet section; 221. positioning holes; 23. a water outlet section; 24. a water inlet flow channel; 25. a water outlet flow channel; 26. a connecting section;

3. a housing; 31. a cross beam; 311. positioning a groove; 32. blind holes; 4. a cover plate; 5. an insulating plate; 51. and (7) lightening holes.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to fig. 4, the present embodiment discloses a battery cell module 1. The battery cell module 1 includes a body 11 and end plates 12 disposed at two ends of the body 11. The bottom of the end plate 12 is provided with a groove 121. Cell module 1 can be installed in casing 3, and the bottom and the casing 3 of end plate 12 are connected, and casing 3 is provided with the liquid cooling board 2 that is used for cooling cell module 1, and liquid cooling board 2 passes recess 121, and forms the clearance between with end plate 12.

In this embodiment, the bottom of end plate 12 is connected with casing 3, because recess 121 is seted up to the bottom of end plate 12, has reduced the area of contact of end plate 12 with casing 3 to reduced end plate 12 and to casing 3 heat transfer, be favorable to reducing the difference in temperature of the both ends of electric core module 1 and mid portion, make the temperature of electric core module 1 more balanced. Furthermore, a gap is formed between the liquid-cooled plate 2 and the end plate 12, that is, the liquid-cooled plate 12 is not in contact with the end plate 12. The heat transfer between end plate 12 and liquid cooling board 2 has been kept off, has further reduced the both ends of electric core module 1 and the difference in temperature of mid portion. Through seting up recess 121 at end plate 12, reduced the influence of end plate 12 to the heat dissipation capacity at the both ends of electric core module 1, be favorable to realizing the uniformity of monomer electric core temperature in electric core module 1.

As shown in fig. 3, an insulating plate 5 is interposed between the end plate 12 and the body 11. Since the end plate 12 is generally an aluminum plate, the insulating plate 5 insulates the end plate 12 from the body 11 of the cell module 1. Simultaneously, insulation board 5 has reduced the heat transfer efficiency between body 11 and end plate 12, is favorable to reducing the temperature difference of the both ends of electric core module 1 and mid portion.

Preferably, the insulating plate 5 is perforated with lightening holes 51. Through seting up lightening hole 51, can reduce insulation board 5's weight effectively, and then reduce electric core module 1's whole weight, be favorable to improving electric core module 1's energy density. In the present embodiment, the lightening holes 51 are square holes. Of course, the lightening holes 51 may be circular holes or polygonal holes. The size and number of the lightening holes 51 are not particularly limited.

Further preferably, the insulating plate 5 is a polypropylene plate. The polypropylene plate has excellent insulating property, is cheap and easy to obtain, and is favorable for reducing the cost of the battery cell module 1.

As shown in fig. 5 and 6, the end plate 12 is configured with a plurality of through holes 122, the through holes 122 extending in the height direction of the end plate 12 and penetrating both ends of the end plate 12 in the height direction thereof. The through holes 122 reduce the overall weight of the end plate 12, which is beneficial to improving the energy density of the cell module 1. The specific shape, size and number of the through holes 122 are not particularly limited.

As shown in fig. 1 and 2, the present embodiment also discloses a battery pack 10. The battery pack 10 includes a casing 3, a cover plate 4 covering the casing 3, a liquid cooling plate 2 installed in the casing 3, and the battery cell module 1. Through seting up recess 121 at end plate 12, reduced the influence of end plate 12 to the heat dissipation capacity at the both ends of electric core module 1, be favorable to realizing the uniformity of monomer electric core temperature in electric core module 1.

In this embodiment, two battery cell modules 1 arranged side by side are installed to the inner cavity of the housing 3. The protruding three crossbeams 31 that are equipped with of diapire of casing 3 for support liquid cold drawing 2 and electric core module 1. It can be understood that the number of the cell modules 1 in the casing 3 may also be one, three or more than three. The size of the housing 3 and the number of the cross beams 31 need to be determined according to the size and the number of the cell modules 1, and the description is omitted here.

Specifically, a rubber pad is filled between the two cross beams 31 of the housing 3. This rubber pad can hold liquid cold drawing 2 to avoid the diapire direct contact of liquid cold drawing 2 with casing 3, avoid 3 high temperature rise of casing, influence the steady operation of battery package 10. Meanwhile, when the battery pack 10 is impacted and collided, the rubber pad has the functions of buffering and shock absorption.

Preferably, the end plate 12 is fixedly connected to the cross beam 31 of the housing 3.

As shown in fig. 1, 5 and 6, the end plate 12 further has a through hole 123 extending in the height direction thereof, the cross beam 31 has a corresponding threaded hole (not shown), and a bolt can be inserted into the corresponding through hole 123 and threadedly coupled with the threaded hole. The end plate 12 is provided with two through holes 123 distributed at two ends of the width direction of the end plate 12, so as to improve the stable connection between the end plate 12 and the cross beam 31. The end plate 12 and the cross beam 31 are fixedly connected through bolts, so that the operation is simple and convenient, and the installation is easy.

As shown in fig. 1, 7 and 8, the liquid cooling plate 2 includes a water inlet section 22, a liquid cooling section 21 and a water outlet section 23 which are sequentially communicated. The liquid cooling section 21 is used for cooling the battery cell module 1, the cross beam 31 of the casing 3 is provided with a positioning groove 311 which is opposite to the groove 121, and the water inlet section 22 or the water outlet section 23 passes through a penetrating space which is formed by the groove 121 and the positioning groove 311 in a surrounding manner and is connected with the positioning groove 311 in a clamping manner.

In this embodiment, the liquid cooling plate 2 has two liquid cooling sections 21, and one ends of the two liquid cooling sections 21 are connected together through a connecting section 26 to form a liquid cooling channel. Two liquid cooling sections 21 pass through the heat-conducting glue layer respectively butt in the bottom of the electric core module 1 that corresponds to carry out cooling to electric core module 1. The two ends of the liquid cooling plate 2 are respectively provided with a water inlet section 22 and a water outlet section 23. The water inlet section 22 is communicated with the water inlet flow passage 24, and the water outlet section 23 is communicated with the water outlet flow passage 25. The water inlet channel 24 and the water outlet channel 25 are both communicated with an external liquid cooling device (not shown in the figure), and the liquid cooling device can drive cooling liquid to flow through the water inlet channel 24, the water inlet section 22, the liquid cooling section 21 and the water outlet section 23 in sequence and finally flow back to the liquid cooling device through the water outlet channel 25 so as to cool the battery cell module 1.

Specifically, the water inlet section 22, the connecting section 26 and the water outlet section 23 are respectively clamped in the positioning grooves 311 of the three corresponding beams 31, so that the rapid positioning and installation of the liquid cooling plate 2 in the housing 3 are realized. Simultaneously, the water inlet section 22 and the water outlet section 23 respectively penetrate through the corresponding penetrating spaces, the water inlet section 22 and the water outlet section 23 are not in contact with the corresponding end plates 12, heat transfer between the end plates 12 and the liquid cooling plate 2 is prevented, and the temperature difference between the two ends and the middle part of the battery cell module 1 is reduced.

Preferably, the depth of the positioning slot 311 is equal to the thickness of the water inlet section 22 or the thickness of the water outlet section 23. When the liquid cooling plate 2 is clamped with the corresponding positioning groove 311 on the cross beam 31, the upper surface of the liquid cooling plate 2 is flush with the upper surface of the cross beam 31, and the liquid cooling plate is more attractive. Meanwhile, the processing amount of the positioning groove 311 is reduced, and the production efficiency of the battery pack and the strength of the shell 3 are improved.

As shown in fig. 8, a fixing portion is disposed at one end of the water inlet section 22 or the water outlet section 23, and the fixing portion is provided with a positioning hole 221 for fixing the liquid cooling plate 2.

In this embodiment, the water inlet section 22 and the water outlet section 23 have the same structure, and both are provided with fixing portions along the extension. The fixing portion is provided with a positioning hole 221, the bottom wall of the housing 3 is correspondingly provided with a blind hole 32, and the blind hole 32 is opposite to the positioning hole 221. The fastener can pass through the positioning hole 221 and the blind hole 32 in sequence to fixedly connect the liquid cooling plate 2 with the shell 3. The fastener may be a pin or bolt.

Preferably, the fixing portion is perpendicular to the water inlet section 22 or the water outlet section 23 and extends in the width direction of the fluid-cooled plate 2. The length of the liquid cooling plate 2 can be shortened, the occupied space of the shell 3 can be reduced, and the liquid cooling plate 2 can be mounted conveniently.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The battery cell module is characterized by comprising a body (11) and end plates (12) arranged at two ends of the body (11), wherein the bottoms of the end plates (12) are provided with grooves (121); the battery core module can be installed in a shell (3), the bottom of an end plate (12) is connected with the shell (3), the shell (3) is provided with a liquid cooling plate (2) used for cooling the battery core module, and the liquid cooling plate (2) penetrates through the groove (121) and forms a gap between the end plates (12).

2. The cell module of claim 1, wherein an insulating plate (5) is sandwiched between the end plate (12) and the body (11).

3. The battery cell module of claim 2, wherein the insulating plate (5) is provided with lightening holes (51).

4. The cell module according to claim 1, characterized in that the end plate (12) is configured with a plurality of through holes (122), the through holes (122) extending in the height direction of the end plate (12) and penetrating through both ends of the end plate (12) in the height direction thereof.

5. The cell module of claim 1, wherein the end plate (12) is fixedly connected to a cross member (31) of the housing (3).

6. The battery cell module of claim 5, wherein the end plate (12) further defines a through hole (123) extending along a height direction thereof, the cross beam (31) defines a corresponding threaded hole, and a bolt can be inserted into the corresponding through hole (123) and is in threaded connection with the threaded hole.

7. A battery pack is characterized by comprising a shell (3), a cover plate (4) covering the shell (3), a liquid cooling plate (2) installed in the shell (3), and the battery cell module set in any one of claims 1-6.

8. The battery pack according to claim 7, wherein the liquid cooling plate (2) comprises a water inlet section (22), a liquid cooling section (21) and a water outlet section (23) which are sequentially communicated; the liquid cooling section (21) is used for cooling the battery cell module, a positioning groove (311) which is opposite to the groove (121) is formed in a cross beam (31) of the shell (3), the water inlet section (22) or the water outlet section (23) penetrates through a penetrating space which is formed by the groove (121) and the positioning groove (311) in a surrounding mode, and the positioning groove (311) is clamped.

9. The battery pack according to claim 8, wherein the depth of the positioning groove (311) is equal to the thickness of the water inlet section (22) or the water outlet section (23).

10. The battery pack according to claim 8, wherein a fixing portion is disposed at one end of the water inlet section (22) or the water outlet section (23), and the fixing portion is provided with a positioning hole (221) for fixing the liquid cooling plate (2).