Module end plate structure and battery module

Abstract

The utility model provides a module end plate structure and a battery module, and belongs to the technical field of batteries. The module end plate structure comprises an end plate body. Wherein the end plate body is provided with two main body parts which are symmetrically arranged. At least two flow guide grooves are formed in each main body part, and the flow guide grooves are symmetrically formed in one surface of the main body part. The flow guide grooves are formed in the thickness direction of the end plate body and used for rapidly discharging liquid located on the surface of the module. The battery module comprises at least two battery cell units and a module end plate structure, wherein the two module end plate structures are respectively positioned at two ends of the battery cell unit and are fixedly connected with the battery cell unit. Therefore, the flow guide grooves are formed in the module end plate structure, liquid can be rapidly discharged or the evaporation performance of the liquid can be improved, and the influence of electrical performance is reduced. The module end plate structure and the battery cell units are combined, and the module end plate structure can be compatible with the battery cell units stacked in parallel. The battery module is compact in structure, and the size and the energy density are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a module end plate structure and a battery module structure. BACKGROUND

[0002] With the advancement of technology and the increasing demand for renewable energy, battery modules have been widely used in many fields such as electric vehicles, renewable energy storage, consumer electronics and industrial equipment. Among them, battery modules are used to provide higher voltage or capacity to meet the needs of various applications.

[0003] Generally speaking, a battery module can be composed of multiple battery cells, which are mechanically and electrically connected to form a whole to provide the required voltage and capacity. Among them, the end plate is an important part of the battery module, mainly used to provide structural support, protect battery cells, dissipate heat, and electrically connect, etc.

[0004] However, in the existing end plate structure, the conventional battery module is usually incompatible when stacked in an array form, and the overall volume is large. In addition, the strength and deformation control of the end plate itself still needs to be improved. UTILITY MODEL CONTENT

[0005] The present application provides a module end plate structure and a battery module. The module end plate structure is provided as two main parts, which are symmetrical and convenient to set corresponding to the battery cell unit. The flow guide groove is provided on the module end plate structure, which can quickly discharge liquid or improve the evaporation performance of the liquid, and reduce the influence on the electrical performance. The combination of the module end plate structure and the battery cell unit makes the module end plate structure compatible with at least two battery cell units stacked side by side, with good compatibility and versatility. In addition, the structure of the battery module is more compact, and the volume and energy density are improved.

[0006] The first aspect of the present application provides a module end plate structure, comprising:

[0007] The end plate body has two main parts which are symmetrically arranged;

[0008] At least two flow guide grooves are provided on each main part, and the flow guide grooves are symmetrically arranged on one side of the main part;

[0009] The flow guide groove is arranged along the thickness direction of the end plate body, and the flow guide groove is used to quickly discharge the liquid on the surface of the module.

[0010] The module end plate structure provided by the first aspect of the embodiment of the present application comprises an end plate body. The end plate body has two main body parts arranged symmetrically. At least two flow guide grooves are arranged on each main body part, and the flow guide grooves are arranged symmetrically on one side of the main body part. The flow guide grooves are arranged along the thickness direction of the end plate body, and the flow guide grooves are used for quickly discharging liquid on the surface of the module. In this way, the module end plate structure is arranged as two main body parts, which is convenient for corresponding arrangement with the battery cell unit. The flow guide grooves arranged on the module end plate structure can quickly discharge liquid or improve the evaporation performance of the liquid, thereby reducing the influence on the electrical performance.

[0011] In a possible implementation, the end plate body has a top surface, a bottom surface, and two side surfaces, the top surface and the bottom surface are arranged opposite to each other, and the two side surfaces are arranged opposite to each other.

[0012] The flow guide grooves are arranged on the top surface, and two ends of the flow guide grooves extend to the two side surfaces, respectively.

[0013] In a possible implementation, the two ends of each main body part are provided with a first positioning hole, respectively.

[0014] The first positioning hole is arranged between the top surface and the bottom surface.

[0015] In a possible implementation, at least one second positioning hole is arranged on the top surface, and the second positioning hole is located on one side of the flow guide groove.

[0016] The second positioning hole is used for inserting and mounting a connector.

[0017] In a possible implementation, at least one third positioning hole is arranged on the top surface, and the third positioning hole is located on the other side of the flow guide groove.

[0018] The third positioning hole is used for fixing and mounting a flexible circuit board.

[0019] In a possible implementation, the bottom surface has at least one positioning part.

[0020] The positioning part is protrudingly arranged on the bottom surface.

[0021] In a possible implementation, the module end plate structure further comprises a plurality of reinforcing ribs.

[0022] The reinforcing ribs are arranged on the side surfaces, and a structure cavity is formed between the reinforcing ribs.

[0023] The second aspect of the present application provides a battery module, comprising:

[0024] At least two battery cell units.

[0025] At least two module end plate structures are respectively located at two ends of the battery cell unit, and the two module end plate structures and the battery cell unit are fixedly connected, wherein at least one of the module end plate structures is the module end plate structure.

[0026] The battery module provided in the second aspect of the embodiments of the present application comprises at least two battery cell units and at least two module end plate structures. The two module end plate structures are respectively located at two ends of the battery cell unit, and the two module end plate structures and the battery cell unit are fixedly connected, wherein at least one of the module end plate structures is the module end plate structure. In this way, the module end plate structure is combined with the battery cell unit, so that the module end plate structure can be compatible with at least two battery cell units stacked side by side, and has good compatibility and versatility. In addition, the structure of the battery module is more compact, and the volume and energy density are improved.

[0027] In a possible implementation, the battery module further comprises a frame, and the battery cell unit is located in the frame.

[0028] The module end plate structure is fixed on the frame by the first fastener penetrating the first positioning hole of the module end plate structure.

[0029] In a possible implementation, the battery module further comprises a flexible circuit board.

[0030] The two ends of the flexible circuit board are fixed on the module end plate structure by the second fastener penetrating the third positioning hole of the module end plate structure.

[0031] It should be understood that the second aspect of the present application corresponds to the technical solution of the first aspect of the present application, and the beneficial effects obtained by each aspect and the corresponding feasible implementation are similar, which will not be repeated here.

[0032] In addition to the technical problems solved by the present application, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features described above, other technical problems solved by the module end plate structure and the battery module provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description are only part of the embodiments of the present application, and these drawings and the text description do not intend to limit the scope of the present application in any way, but to explain the present application to those skilled in the art by reference to specific embodiments. Those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0034] Figure 1 The structural schematic diagram of the module end plate structure provided by the embodiments of the present application is shown in the figure.

[0035] Figure 2 The structural schematic diagram of the battery module provided by the embodiments of the present application is shown in the figure.

[0036] Explanation of reference signs:

[0037] 100-Module end plate structure

[0038] 200-End plate body; 210-Body part; 220-Top surface; 221-Flow guide groove; 222-First positioning hole; 223-Second positioning hole; 224-Third positioning hole; 230-Bottom surface; 231-Positioning part; 240-Side surface; 241-Stiffener; 242-Structural cavity

[0039] 300-Battery module

[0040] 400-Cell unit

[0041] 500-Flexible circuit board; 510-Support DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below by combining the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0043] As described in the background, in the existing end plate structure, the end plate is usually incompatible when the conventional battery module is stacked in an array form, and the overall volume is large. In addition, the strength and deformation control degree of the end plate itself still need to be improved.

[0044] To solve the above technical problems, the embodiment of the present application provides a module end plate structure. The module end plate structure comprises an end plate body. The end plate body has two main body parts arranged symmetrically. At least two flow guide grooves are arranged on each main body part, and the flow guide grooves are arranged symmetrically on one side of the main body part. The flow guide grooves are arranged along the thickness direction of the end plate body, and the flow guide grooves are used for quickly discharging liquid on the surface of the module. In this way, the module end plate structure is arranged as two main body parts, which is convenient for corresponding arrangement with the battery cell unit. The flow guide grooves arranged on the module end plate structure can quickly discharge liquid or improve the evaporation performance of liquid, thereby reducing the influence on the electrical performance.

[0045] The second aspect of the embodiment of the present application provides a battery module. The battery module comprises at least two battery cell units and at least two module end plate structures. The two module end plate structures are respectively arranged at the two ends of the battery cell unit, and the two module end plate structures are fixedly connected with the battery cell unit, and at least one of the module end plate structures is the module end plate structure described above. In this way, the module end plate structure is combined with the battery cell unit, so that the module end plate structure can be compatible with at least two battery cell units arranged side by side and stacked, and has good compatibility and universality. In addition, the structure of the battery module is more compact, and the volume and energy density are improved.

[0046] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0047] The embodiments of the present application provide a module end plate structure and a battery module. The module end plate structure is arranged as two main body parts arranged symmetrically, which is convenient for corresponding arrangement with the battery cell unit. The flow guide grooves arranged on the module end plate structure can quickly discharge liquid or improve the evaporation performance of liquid, thereby reducing the influence on the electrical performance. The module end plate structure is combined with the battery cell unit, so that the module end plate structure can be compatible with at least two battery cell units arranged side by side and stacked, and has good compatibility and universality. In addition, the structure of the battery module is more compact, and the volume and energy density are improved. The specific structure of the module end plate structure and the battery module provided by the embodiments of the present application will be introduced below with reference to the drawings.

[0048] Reference Figure 1 The embodiment of the present application provides a module end plate structure 100 in the first aspect. The module end plate structure 100 can comprise an end plate body 200. As shown in Figure 2As shown, the end plate body 200 can be a rectangular structure, but this embodiment does not impose any limitations. In one possible implementation, the end plate body 200 may include a plurality of identical main body portions 210. Exemplarily, two main body portions 210 are described. In this embodiment, the end plate body 200 has two main body portions 210, and the two main body portions 210 can be symmetrically arranged, thereby facilitating their corresponding arrangement with the stacked battery cell units 400.

[0049] Continue to refer to Figure 1 Based on the above embodiments, each main body 210 may be provided with a flow guide groove 221. In one possible implementation, the number of flow guide grooves 221 may be at least two, and this application embodiment does not impose a limitation. In this application embodiment, two flow guide grooves 221 on each main body 210 are used as an example. The two flow guide grooves 221 may be symmetrically arranged on one side of the main body 210. The flow guide grooves 221 may be arranged along the thickness direction of the end plate body 200. It is understood that the flow guide grooves 221 can be used to quickly discharge liquid located on the module surface or improve the evaporation performance of the liquid, thereby reducing the impact on electrical performance.

[0050] It should be noted that, for ease of understanding, in this embodiment, the length direction of the end plate body 200 can be... Figure 1 In the x-direction, the width direction of the end plate body 200 can be... Figure 1 In the y-direction, the thickness direction of the end plate body 200 can be... Figure 1 The z-direction in the equation.

[0051] Continue to refer to Figure 1 Based on the above embodiments, the end plate body 200 may have a top surface 220, a bottom surface 230, and two side surfaces 240. The top surface 220 and bottom surface 230 are arranged opposite to each other, and the two side surfaces 240 are arranged opposite to each other. In one possible implementation, a flow guide groove 221 may be formed on the top surface 220, and each flow guide groove 221 may extend to both sides 240 at its two ends, thereby achieving sufficient flow guidance.

[0052] Continue to refer to Figure 1 Based on the above embodiments, each main body 210 may have a first positioning hole 222 at both ends in the length direction. The first positioning hole 222 may be disposed through the top surface 220 and bottom surface 230 of the end plate body 200, that is, the first positioning hole 222 may be disposed through the width direction of the end plate body 200, so as to facilitate the fastener to pass through the first positioning hole 222, thereby realizing the fixation of the module end plate structure 100.

[0053] In the embodiments of this application, such as Figure 1As shown, the two main body parts 210 can be provided with four first positioning holes 222. Among them, the first positioning hole 222 at one end of one of the main body parts 210 and the first positioning hole 222 at one end of the other main body part 210 can be arranged adjacent to each other. It can be understood that a corresponding number of fasteners are arranged to pass through and fix the first positioning holes 222, thereby improving the strength of the module end plate structure 100.

[0054] With reference to the above Figure 1 On the basis of the above-mentioned embodiments, the top surface 220 can also be provided with a second positioning hole 223. Among them, in a possible implementation, the number of second positioning holes 223 can be at least one, and the number of second positioning holes 223 is not limited in the embodiments of the present application. In the embodiments of the present application, the second positioning hole 223 can be located at one side of the flow guide groove 221. In a possible implementation, the second positioning hole 223 can be located between the first positioning hole 222 and the flow guide groove 221. It can be understood that the second positioning hole 223 can be used for the insertion and installation of the external plug-in part.

[0055] With reference to the above Figure 1 In a possible implementation, the second positioning hole 223 can be arranged in a rectangular structure. In this way, the second positioning hole 223 arranged in a rectangular structure can facilitate the installation of the external plug-in part, and the contact surface of the rectangular structure can improve the anti-deformation capability of the external plug-in part.

[0056] With reference to the above Figure 1 On the basis of the above-mentioned embodiments, the top surface 220 can also be provided with a third positioning hole 224. Among them, in a possible implementation, the number of third positioning holes 224 can be at least one, and the number of third positioning holes 224 is not limited in the embodiments of the present application. In the embodiments of the present application, the third positioning hole 224 is located at the other side of the flow guide groove 221. In a possible implementation, the third positioning hole 224 can be located between the two flow guide grooves 221. It can be understood that the third positioning hole 224 can be used for the fixation and installation of the flexible circuit board 500.

[0057] With reference to the above Figure 1 On the basis of the above-mentioned embodiments, the bottom surface 230 can have a positioning part 231. Among them, in a possible implementation, the number of positioning parts 231 can be at least one, and the number of positioning parts 231 is not limited in the embodiments of the present application. In the embodiments of the present application, the positioning part 231 can be protrudingly arranged on the bottom surface 230. It can be understood that the positioning part 231 can be protrudingly arranged in the width direction of the end plate body 200, and the positioning part 231 can facilitate the auxiliary positioning of the position between the module end plate structure 100 and the battery module 300.

[0058] With reference to the above Figure 1 On the basis of the above-mentioned embodiments, the module end plate structure 100 further comprises: a reinforcing rib 241. In a possible implementation, the number of reinforcing ribs 241 can be several, and the number of reinforcing ribs 241 is not limited in the embodiments of the present application. In the embodiments of the present application, the several reinforcing ribs 241 can be respectively located on the two side surfaces 240, and the several reinforcing ribs 241 can form several structural cavities 242 with different shapes. It can be understood that the structural cavities 242 can be used to enhance the structural strength of the module end plate structure 100. In addition, by opening the structural cavities 242 on the side surfaces 240 of the end plate body 200, the amount of material used can be reduced, thereby reducing the overall weight of the module end plate structure 100.

[0059] With reference to the above Figure 2 In a second aspect, the embodiments of the present application provide a battery module 300. The battery module 300 can comprise a battery cell unit 400 and a module end plate structure 100. In a possible implementation, the number of battery cell units 400 and module end plate structures 100 can be at least two, and the number of battery cell units 400 and module end plate structures 100 is not limited in the embodiments of the present application. In the embodiments of the present application, the number of battery cell units 400 and module end plate structures 100 is taken as two for example. The two battery cell units 400 can be arranged in parallel and stacked. In the embodiments of the present application, the two module end plate structures 100 can be respectively located at the two ends of the battery cell unit 400, and the two module end plate structures 100 can be fixedly connected with the battery cell unit 400. In a possible implementation, one of the module end plate structures can be the module end plate structure 100 described above, and the other module end plate structure is different from the opening position of each positioning hole in the module end plate structure 100 described above. Of course, in some other embodiments, both of the two module end plate structures can be the module end plate structure 100 described above. In this way, the module end plate structure 100 provided by the embodiments of the present application can be combined with the battery cell unit 400, so that the module end plate structure 100 has good compatibility and versatility. In addition, the structure of the battery module 300 is more compact, and the volume and energy density are improved.

[0060] With reference to the above Figure 2Based on the above embodiments, the battery module 300 may further include a frame (not shown in the figure). The battery cell unit 400 may be located within the frame, and the module end plate structure 100 may be located at both ends of the frame and fixedly connected to the frame. It is understood that the frame can provide good support and protection for the battery cell unit 400. In one possible implementation, the module end plate structure 100 can be fixed to the frame by a first fastener passing through the first positioning hole 222 of the module end plate structure 100, thereby achieving a fixed connection between the module end plate structure 100 and the frame.

[0061] Continue to refer to Figure 2 Based on the above embodiments, the battery module 300 may further include a flexible circuit board 500. The flexible circuit board 500 may be located on the upper surface of the cell unit 400. In one possible implementation, both ends of the flexible circuit board 500 may be fixed to the module end plate structure 100 by means of second fasteners passing through the third positioning holes 224 of the module end plate structure 100.

[0062] In one possible implementation, the flexible circuit board 500 may have brackets 510 at both ends. One end of the bracket 510 is connected to the flexible circuit board 500, and the other end of the bracket 510 is inserted into the third positioning hole 224, thereby fixing the flexible circuit board 500 to the module end plate structure 100 via the brackets 510. By providing the bracket structure 510, the overall height of the flexible circuit board 500 can be increased, thereby increasing the distance between the flexible circuit board 500 and the module end plate structure 100, and thus improving electrical insulation and withstand voltage.

[0063] Continue to refer to Figure 2 Based on the above embodiments, the positioning part 231 of the module end plate structure 100 can extend toward the frame, which facilitates the auxiliary positioning of the cell unit 400 in the frame, thereby improving the installation accuracy. In addition, the positioning part 231 is set to protrude from the bottom surface 230 of the module end plate structure 100, which avoids the positioning part 231 extending toward the cell unit 400, thereby avoiding the situation where the positioning part 231 punctures the cell unit 400.

[0064] In the embodiment of the present application, the module end plate structure 100 provided by the embodiment of the present application can be set as two symmetrical main body parts 210, facilitating corresponding arrangement with the battery cell unit 400. The flow guide groove 221 is arranged on the module end plate structure 100, which can more quickly discharge liquid or improve the evaporation performance of the liquid, reducing the influence on the electrical performance. The combination of the module end plate structure 100 and the battery cell unit 400 enables the module end plate structure 100 to be compatible with at least two battery cell units 400 stacked side by side, having good compatibility and universality. In addition, the structure of the battery module 300 is more compact, and the volume and energy density are improved.

[0065] Each embodiment or implementation in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between embodiments can be referred to each other.

[0066] It should be noted that the terms "in a specific implementation", "in some embodiments", "in the present embodiment", "exemplarily" and the like in the specification mean that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it is within the knowledge of those skilled in the art to realize such feature, structure or characteristic in combination with other embodiments described explicitly or implicitly.

[0067] Generally, the terms should be understood at least partly by the use in the context. For example, at least partly according to the context, the term "one or more" used in the specification can be used to describe any feature, structure or characteristic in the singular sense, or can be used to describe a combination of features, structures or characteristics in the plural sense. Similarly, at least partly according to the context, terms such as "a" or "said" can be understood to convey singular usage or convey plural usage.

[0068] It should be easily understood that "on", "above" and "over" in the present disclosure should be interpreted in the broadest way, so that "on" not only means "directly on", but also includes the meaning of "on" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over", but also can include the meaning of "above" or "over" without intermediate features or layers therebetween (i.e. directly on).

[0069] Moreover, spatially relative terms, such as "beneath", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0070] In the end it should be stated that further embodiments of the application will occur to those skilled in the art, having regard to the specification and practice of the application disclosed herein. The application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such further modifications and features as come within the scope of the application, as can be known, considered or deemed relatively commonplace to the art, not following but included in the present description and drawings and can be apparent to those skilled in the art and, accordingly, can be rendered without departing from the scope of the application which is set out only in the accompanying claims. The scope of the application is limited only by the claims which are appended hereto.

Claims

1. A modular end plate structure, characterized by The utility model relates to a battery module end plate structure, which comprises: An end plate body having two main body parts arranged symmetrically; At least two flow guide grooves are formed on each of the main body parts, and the flow guide grooves are symmetrically arranged on one side of the main body part; The flow guide grooves are arranged along the thickness direction of the end plate body, and the flow guide grooves are used for quickly discharging liquid on the surface of the module.

2. The modular end plate structure of claim 1, wherein, The end plate body has a top surface, a bottom surface, and two side surfaces, the top surface and the bottom surface are oppositely arranged, and the two side surfaces are oppositely arranged; The flow guide grooves are formed on the top surface, and the two ends of the flow guide grooves extend on the two side surfaces, respectively.

3. The modular end plate structure of claim 2, wherein, First positioning holes are formed at the two ends of each main body part; The first positioning holes are arranged through the top surface and the bottom surface.

4. The modular end plate structure of claim 3, wherein, At least one second positioning hole is formed on the top surface, and the second positioning hole is located on one side of the flow guide groove; The second positioning hole is used for inserting and mounting a connector.

5. The modular end plate structure of claim 4, wherein, At least one third positioning hole is formed on the top surface, and the third positioning hole is located on the other side of the flow guide groove; The third positioning hole is used for fixing and mounting a flexible circuit board.

6. The modular endplate structure of any of claims 2-5, wherein, The bottom surface has at least one positioning part; The positioning part is protrudingly arranged on the bottom surface.

7. The modular endplate structure of any of claims 2-5, wherein, The module end plate structure further comprises: a plurality of reinforcing ribs; The reinforcing ribs are located on the side surfaces, and a structural cavity is formed between the reinforcing ribs.

8. A battery module, characterized by The utility model relates to a battery module end plate structure, which comprises: At least two battery cell units; At least two module end plate structures, two of which are located at the two ends of the battery cell unit, and the two module end plate structures and the battery cell unit are fixedly connected, wherein at least one of the module end plate structures is the module end plate structure according to any one of claims 1-7.

9. The battery module of claim 8, wherein, The battery module further comprises a frame, and the battery cell unit is located in the frame; The module end plate structure is arranged through the first positioning hole of the module end plate structure by a first fastener and is fixed on the frame.

10. The battery module of claim 8, wherein, The battery module further comprises a flexible circuit board; The two ends of the flexible circuit board are arranged through the third positioning hole of the module end plate structure by a second fastener and are fixed on the module end plate structure.

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