Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack, the battery module comprises a plurality of cylindrical pole groups, the plurality of cylindrical pole groups are divided into two groups, and the two groups of cylindrical pole groups are arranged in a laminated manner; and the cold plate assembly is arranged between the two cylindrical pole groups, the cold plate assembly comprises a heating film and a cold plate body, and the heating film is arranged on the surface of at least one side of the cold plate body and located between the cold plate body and the cylindrical pole groups. According to the battery module disclosed by the utility model, the heating film is arranged on the cold plate body, so that the problem that the pole group cannot be quickly heated by the battery module in the conventional cylindrical pole group snake-shaped cold plate scheme is solved, the pole group can be quickly positioned in the optimal working temperature, and the pole group can be quickly disassembled and maintained after the pole group has a problem; the maintenance difficulty and the maintenance cost of the battery module are reduced, and the maintenance efficiency of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery module and a battery pack. Background Art

[0002] The relevant technology points out that for the module of the cylindrical pole group serpentine cold plate, the first version of the heating scheme still uses the refrigerant in the serpentine cold plate for heating, and the pole group and the cold plate cannot be disassembled for maintenance; the refrigerant heating method, such as liquid, needs to be heated and transferred to the pole group position before the pole group can be heated, such as phase change material direct cooling refrigerant refrigerant, which requires a compressor to compress the refrigerant before the phase change of the refrigerant can be achieved to heat the pole group. The above methods have high energy consumption and the pole group and the cold plate cannot be disassembled for maintenance. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery module, which solves the problem that the current cylindrical electrode group serpentine cold plate solution module cannot quickly heat the electrode group.

[0004] The utility model also provides a battery pack having the battery module.

[0005] According to the first aspect of the utility model, the battery module comprises: a plurality of cylindrical pole groups, the plurality of cylindrical pole groups are divided into two groups, the two groups of cylindrical pole groups are stacked; a cold plate assembly, the cold plate assembly is arranged between the two groups of cylindrical pole groups, the cold plate assembly comprises: a heating film and a cold plate body, the heating film is arranged on at least one side surface of the cold plate body and is located between the cold plate body and the cylindrical pole groups.

[0006] According to the battery module of the utility model, a heating film is arranged on the cold plate body, thereby solving the problem that the battery module of the current cylindrical electrode group serpentine cold plate solution cannot quickly heat the electrode group, so that the electrode group can be quickly at the optimal working temperature, and after the electrode group has a problem, the electrode group can be quickly disassembled and repaired, which reduces the maintenance difficulty and maintenance cost of the battery module and improves the maintenance efficiency of the battery module.

[0007] In some embodiments, a plurality of through holes are formed on the heating film, the plurality of through holes are arranged in an array, and the positions of the through holes are arranged corresponding to the contact positions where the cylindrical pole group is tangent to the cold plate assembly.

[0008] In some embodiments, the cold plate assembly includes a first arc portion and a second arc portion, the first arc portion is convex upward, the second arc portion is concave downward, and the first arc portion and the second arc portion are alternately arranged and smoothly connected.

[0009] In some embodiments, the heating film includes: a film body, the film body includes at least two, and the two film bodies are stacked; and a heating element, the heating element is arranged between the two film bodies.

[0010] In some embodiments, the heating film further includes: a plug connector, which is arranged at one end of the heating film.

[0011] In some embodiments, the battery module further includes: two current collectors, which are respectively disposed at two ends of the cold plate assembly.

[0012] In some embodiments, one of the two current collectors is formed with a liquid inlet, and the other of the two current collectors is formed with a liquid outlet, and joints are provided at the positions of the liquid inlet and the liquid outlet.

[0013] In some embodiments, the membrane body is a polyacetamide PI film or a high temperature resistant film.

[0014] In some embodiments, the battery module further includes: end plates, which are arranged at both ends of the cylindrical electrode group in the axial direction.

[0015] According to the second aspect of the utility model, the battery pack comprises: an outer shell, a accommodating cavity is formed in the outer shell, the outer shell comprises a shell body and a cover body, the shell body defines the accommodating cavity, and the cover body covers the open side of the accommodating cavity; according to the first aspect of the utility model, the battery module comprises a plurality of battery modules, the plurality of battery modules are arranged in the accommodating cavity and arranged along the axial direction of the cylindrical pole group.

[0016] According to the battery pack of the utility model, by setting the battery module of the first aspect of the utility model, the problem that the module of the current cylindrical electrode group serpentine cold plate solution cannot quickly heat the electrode group is solved, so that the electrode group can be quickly at the optimal working temperature, reducing the difficulty of disassembly and maintenance of the battery pack, improving production and maintenance efficiency, and enhancing the safety of the battery pack.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the battery pack shown in;

[0020] Figure 3 yes Figure 1A schematic diagram of a battery module shown in;

[0021] Figure 4 yes Figure 3 A schematic diagram of a cold plate assembly shown in ;

[0022] Figure 5 yes Figure 4 Schematic diagram of the heating film shown in;

[0023] Figure 6 yes Figure 5 An exploded schematic diagram of the heating film shown in ;

[0024] Figure 7 yes Figure 3 The assembly diagram of the battery module shown in FIG.

[0025] Reference numerals:

[0026] 100. Battery module;

[0027] 1. Cold plate assembly;

[0028] 11. Heating film; 111. Film body; 112. Heating element; 113. Through hole; 114. Plug connector;

[0029] 12. Cold plate body;

[0030] 2. Cylindrical electrode group; 3. Current collector;

[0031] 4. End plate; 5. Joint;

[0032] 200, housing; 201, shell; 202, cover;

[0033] 1000. Battery pack. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] First, refer to Figure 1-Figure 7 A battery pack 1000 according to an embodiment of the second aspect of the utility model is briefly described. The battery pack 1000 includes a battery module 100 according to an embodiment of the first aspect of the utility model.

[0036] The battery pack 1000 according to the embodiment of the utility model comprises: a housing 200 and a battery module 100 according to the embodiment of the first aspect of the utility model, wherein a receiving cavity is formed in the housing 200, the housing 200 comprises a shell 201 and a cover 202, the shell 201 defines the receiving cavity, the cover 202 covers the open side of the receiving cavity, and the battery module 100 comprises a plurality of battery modules 100, which are arranged in the receiving cavity and along the axial direction of the cylindrical electrode group 2. Thus, the battery pack 1000 has a simple structure and is easy to disassemble and maintain.

[0037] According to the battery pack 1000 of the embodiment of the utility model, by setting the battery module 100 of the first aspect of the utility model embodiment, the problem that the battery module 100 of the current cylindrical electrode group 2 serpentine cold plate solution cannot quickly heat the electrode group is solved, so that the electrode group can be quickly at the optimal working temperature, the difficulty of disassembly and maintenance of the battery pack 1000 is reduced, the production and maintenance efficiency is improved, and the safety of the battery pack 1000 is enhanced.

[0038] Reference below Figure 3 and Figure 7 A battery module 100 according to an embodiment of the first aspect of the present invention is described.

[0039] like Figure 3 As shown, the battery module 100 according to the first embodiment of the utility model includes: a cold plate assembly 1 and a plurality of cylindrical electrode groups 2.

[0040] Specifically, the plurality of cylindrical electrode groups 2 are divided into two groups, the two groups of cylindrical electrode groups 2 are stacked, the cold plate assembly 1 is arranged between the two groups of cylindrical electrode groups 2, and the cold plate assembly 1 includes: a heating film 11 and a cold plate body 12, the heating film 11 is arranged on at least one side surface of the cold plate body 12 and is located between the cold plate body 12 and the cylindrical electrode group 2. As a result, the battery module 100 has a simple structure and is easy to assemble and maintain.

[0041] When the electrode group is at a low temperature, the heating film 11 is powered on to quickly heat the electrode group by heating the heating film 11, so as to quickly reach the optimal working temperature; when a problem occurs with the electrode group, the heating film 11 is powered on to melt the adhesive of the electrode group by heating the heating film 11, so as to achieve disassembly and maintenance of the electrode group.

[0042] According to the battery module 100 of the embodiment of the utility model, a heating film 11 is arranged on the cold plate body 12, thereby solving the problem that the battery module 100 of the current cylindrical electrode group 2 serpentine cold plate solution cannot quickly heat the electrode group, so that the electrode group can be quickly at the optimal working temperature, and after a problem occurs in the electrode group, the electrode group can be quickly disassembled and repaired, thereby reducing the maintenance difficulty and maintenance cost of the battery module 100 and improving the maintenance efficiency of the battery module 100.

[0043] In some embodiments of the utility model, a plurality of through holes 113 are formed on the heating film, and the plurality of through holes 113 are arranged in an array, and the positions of the through holes 113 are arranged and arranged corresponding to the contact positions where the cylindrical electrode group 2 is tangent to the cold plate assembly 1. Thus, the electrode group and the cold plate are bonded at the through holes 113, and the electrode group has both the heating function and the cooling function, and the side of the electrode group can be in direct contact with the cold plate assembly 1, which hardly affects the cooling effect of the cold plate assembly 1, and the design of the cold plate assembly 1 is ingenious.

[0044] Specifically, the through hole 113 is formed in the first arc portion and the second arc portion. During assembly, the heating film 11 is first bonded to the front and back sides of the cold plate body 12. The through hole 113 of the heating film 11 is the bonding position between the pole group and the cold plate. Then, glue is applied to the bonding position, and the pole group is placed, positioned, pressed and solidified to achieve bonding between the cylindrical pole group 2 and the cold plate assembly 1.

[0045] In some embodiments of the present invention, Figure 4 As shown, the cold plate assembly 1 includes a first arc portion and a second arc portion, the first arc portion is convex upward, the second arc portion is concave downward, the first arc portion and the second arc portion are alternately arranged and smoothly connected. Therefore, the first arc portion and the second arc portion are convenient for setting the cylindrical electrode group 2, reducing the assembly difficulty of the battery module 100 and improving the assembly efficiency of the battery module 100.

[0046] In some embodiments of the present invention, the heating film 11 includes: a film body 111 and a heating element 112. The film body 111 includes at least two film bodies 111, the two film bodies 111 are stacked, and the heating element 112 is arranged between the two film bodies 111. Therefore, the structure of the heating film 11 is simple, and rapid heating of the electrode group can be achieved.

[0047] Preferably, the heating element 112 is a heating wire, and the heating wire may be a copper heating wire or an aluminum heating wire.

[0048] In some embodiments of the present invention, the heating film 11 further includes: a plug connector 5114, which is disposed at one end of the heating film 11. As shown in the figure, the plug connector 5114 is used to supply power, thereby realizing the heating function of the heating film 11, and the design is practical, which improves the functionality of the heating film 11.

[0049] In some embodiments of the present invention, Figure 3 As shown, the battery module 100 further includes: two current collectors 3, which are respectively arranged at both ends of the cold plate assembly 1, and the current collectors 3 are provided with a liquid inlet connector 5 and a liquid outlet connector 5. Thus, the structure of the cold plate assembly 1 connected to the current collectors 3 is simple, which simplifies the structure of the battery module 100 and facilitates production and assembly.

[0050] In some embodiments of the present invention, one of the two current collectors 3 is formed with a liquid inlet, the other of the two current collectors 3 is formed with a liquid outlet, and the positions of the liquid inlet and the liquid outlet are both provided with connectors 5. Thus, the internal structure of the battery module 100 is more centralized, the number of components inside the battery module 100 is reduced, the difficulty of assembly is reduced, and the production efficiency is improved.

[0051] Preferably, the membrane body 111 is a polyacetamide PI film or a high temperature resistant film.

[0052] In some embodiments of the present invention, the battery module 100 further includes: end plates 4, which are arranged at both ends of the cylindrical electrode group 2 in the axial direction. This facilitates the assembly of the cylindrical electrode group 2, reduces the difficulty of assembly and production, and improves production efficiency.

[0053] The battery pack 1000 according to the second embodiment of the present invention includes the battery module 100 according to the first embodiment of the present invention.

[0054] Specifically, Figure 1 and Figure 2 As shown, the battery pack 1000 includes: a housing 200 and a battery module 100 according to the first embodiment of the utility model, a receiving cavity is formed in the housing 200, the housing 200 includes a shell 201 and a cover 202, the shell 201 defines the receiving cavity, the cover 202 covers the open side of the receiving cavity, and the battery module 100 includes a plurality of battery modules 100, which are arranged in the receiving cavity and along the axial direction of the cylindrical electrode group 2. Therefore, the battery pack 1000 has a simple structure and is easy to disassemble and maintain.

[0055] According to the battery pack 1000 of the embodiment of the utility model, by setting the battery module 100 of the first aspect of the utility model, the problem that the module of the current cylindrical electrode group 2 serpentine cold plate solution cannot quickly heat the electrode group is solved, so that the electrode group can be quickly at the optimal working temperature, the difficulty of disassembly and maintenance of the battery pack 1000 is reduced, the production and maintenance efficiency is improved, and the safety of the battery pack 1000 is enhanced.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that: include: A plurality of cylindrical pole groups, wherein the plurality of cylindrical pole groups are divided into at least two groups, and two adjacent groups of cylindrical pole groups are stacked; A cold plate assembly is provided between two adjacent groups of cylindrical pole groups. The cold plate assembly comprises a heating film and a cold plate body. The heating film is provided on at least one side surface of the cold plate body and is located between the cold plate body and the cylindrical pole groups.

2. The battery module according to claim 1, characterized in that: A plurality of through holes are formed on the heating film, and the plurality of through holes are arranged in an array, and the positions of the through holes are arranged and arranged corresponding to the contact positions where the cylindrical pole group is tangent to the cold plate assembly.

3. The battery module according to claim 1, characterized in that: The cold plate assembly includes a first arc portion and a second arc portion, the first arc portion is convex upward, the second arc portion is concave downward, and the first arc portion and the second arc portion are alternately arranged and smoothly connected.

4. The battery module according to claim 3, characterized in that: The heating film comprises: A membrane body, wherein the membrane body comprises at least two membrane bodies, and the two membrane bodies are stacked; A heating element is arranged between the two membrane bodies.

5. The battery module according to claim 3, characterized in that: The heating film further comprises: a plug connector, which is arranged at one end of the heating film.

6. The battery module according to any one of claims 1 to 5, characterized in that: Also includes: Two current collectors are respectively arranged at two ends of the cold plate assembly.

7. The battery module according to claim 6, characterized in that: One of the two current collectors is formed with a liquid inlet, and the other of the two current collectors is formed with a liquid outlet. Joints are provided at the positions of the liquid inlet and the liquid outlet.

8. The battery module according to claim 4, characterized in that: The membrane body is a polyacetamide PI membrane or a high temperature resistant membrane.

9. The battery module according to any one of claims 1 to 5, characterized in that: Also includes: End plates are arranged at two ends of the cylindrical pole group in the axial direction.

10. A battery pack, characterized in that: include: A housing, wherein a receiving cavity is formed in the housing, the housing comprising a shell and a cover, the shell defining the receiving cavity, and the cover covering an open side of the receiving cavity; The battery module according to any one of claims 1 to 9, wherein the battery module comprises a plurality of battery modules, and the plurality of battery modules are disposed in the accommodating cavity and arranged along the axial direction of the cylindrical electrode group.

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