Battery module assembly

Abstract

The utility model provides a battery module assembly, which relates to the technical field of batteries and comprises a battery module structure and a battery module, the liquid cooling plate assembly wraps at least part of the battery module structure, and the liquid cooling plate assembly is used as a heat dissipation component of the battery module structure and also serves as a structural reinforcing part of the battery module structure; the liquid cooling plate assembly dissipates heat in a mode of wrapping a battery module structure, the heat dissipation area is effectively increased, the heat dissipation efficiency is improved to the maximum extent, meanwhile, the wrapping design mode of the liquid cooling plate assembly can replace an original structural reinforcing piece, and the cost is reduced. The overall strength and rigidity of the battery module assembly can be improved by utilizing the strength of the liquid cooling plate assembly and the layout form of the liquid cooling plate assembly, so that the battery module assembly can meet the use capability of coping with more harsh working conditions, and furthermore, original structural reinforcements can be omitted, and the situation that the original structural reinforcements occupy larger space is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and more specifically, relates to a battery module assembly. Background Art

[0002] Batteries are the power source or storage medium for new energy vehicles, energy storage power stations and new energy applications. As battery applications become more and more widespread, higher requirements are placed on the heat dissipation capacity of battery modules. At present, the heat dissipation system layout of existing battery module assemblies is insufficient and cannot efficiently dissipate heat from battery modules. At the same time, the structural reinforcements of existing battery module assemblies, such as ribs or beams, are designed and used separately from the liquid cooling system, and each requires a separate layout space designed on the battery module assembly, resulting in a large overall space occupied by the battery module assembly and a large variety of parts, which will also lead to a sharp increase in cost. Utility Model Content

[0003] The purpose of the utility model is to provide a battery module assembly in view of the deficiencies in the existing technology, so as to solve the problem that the heat dissipation system layout of the existing battery module assembly proposed in the above background technology is insufficient and cannot efficiently dissipate the heat of the battery module. At the same time, the structural reinforcements of the existing battery module assembly, such as structural reinforcements such as reinforcing ribs or beams, are designed and used separately from the liquid cooling system, and each requires a separate layout space designed on the battery module assembly, resulting in a large overall space occupied by the battery module assembly and a large variety of parts, which will also lead to a sharp increase in cost.

[0004] In order to achieve the above object, the utility model provides a battery module assembly, which includes:

[0005] Battery module structure;

[0006] A liquid cooling plate assembly, wherein the liquid cooling plate assembly wraps at least a portion of the battery module structure, and the liquid cooling plate assembly is used as a heat dissipation component of the battery module structure and also serves as a structural reinforcement of the battery module structure.

[0007] Preferably, the liquid cooling plate assembly comprises:

[0008] Four liquid cooling plates, the four liquid cooling plates are respectively attached to the top, bottom and two side surfaces of the battery module structure, two adjacent liquid cooling plates are connected to each other, and the liquid cooling plates are used to communicate with the liquid cooling circulation system;

[0009] A plurality of fastening connectors pass through the battery module structure and are used to connect the liquid cooling plate at the top and the liquid cooling plate at the bottom.

[0010] Preferably, the battery module assembly further comprises two end plates, the two end plates are respectively connected to the two ends of the battery module structure, and the end plates are connected to the four liquid cooling plates.

[0011] Preferably, the battery module assembly further includes:

[0012] Two heating elements, the two heating elements are respectively arranged on the top liquid cooling plate and the bottom liquid cooling plate;

[0013] A plurality of temperature collection elements, wherein the plurality of temperature collection elements are distributed on the battery cell body of the battery module structure;

[0014] A controller is electrically connected to the heating element and the plurality of temperature collecting elements, and the controller is capable of receiving signals detected by the plurality of temperature collecting elements and sending control instructions to the heating element.

[0015] Preferably, the battery module structure comprises:

[0016] Battery module;

[0017] Two busbar supports are respectively arranged on two side surfaces of the battery module, and two ends of the busbar support are respectively connected to the two end plates.

[0018] Two busbars are respectively connected to the two busbar brackets, and the busbars are used to connect the pole ears of the battery module in series or in parallel.

[0019] Preferably, a heat-conducting layer is provided between the liquid cooling plate assembly and the battery module structure, and the heat-conducting layer is a heat-conducting pad layer or a heat-conducting adhesive layer.

[0020] Preferably, the fastening connector includes a fastening screw and a fastening nut, one end of the fastening screw passes through the top liquid cooling plate, the battery module structure and the bottom liquid cooling plate, and is threadedly connected to the fastening nut.

[0021] Preferably, the end plate comprises an end plate body, the end plate body is a plastic end plate body, a pole nut is embedded in the end plate body, and the outer side of the end plate body is covered with a reinforcing rib plate, and the reinforcing rib plate is a metal reinforcing rib plate.

[0022] Preferably, the liquid cooling plates on both sides are aluminum liquid cooling plates.

[0023] Preferably, two adjacent liquid cooling plates are connected by fastening bolts, and the liquid cooling plate and the end plate are connected by fastening bolts.

[0024] The utility model provides a battery module assembly, which has the beneficial effects that: the liquid cooling plate assembly of the battery module assembly wraps at least a part of the battery module structure, the liquid cooling plate assembly is used as a heat dissipation component of the battery module structure and also serves as a structural reinforcement of the battery module structure, the liquid cooling plate assembly adopts a method of wrapping the battery module structure to dissipate heat, effectively increases the heat dissipation area, and maximizes the heat dissipation efficiency, and at the same time, the liquid cooling plate assembly wrapping design method can replace the original structural reinforcement, and the strength of the liquid cooling plate assembly and the layout of the liquid cooling plate assembly can improve the overall strength and rigidity of the battery module assembly, so that it can meet the ability to cope with more severe working conditions, and then, the original structural reinforcement can be cancelled to avoid the original structural reinforcement occupying a large space, and at the same time, the types of parts of the battery module assembly are also reduced a lot, which reduces the production cost and ensures the heat dissipation capacity.

[0025] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0027] Figure 1 A schematic diagram of an exploded structure of a battery module assembly according to an embodiment of the utility model is shown;

[0028] Figure 2 A schematic cross-sectional view of a battery module assembly according to an embodiment of the utility model is shown;

[0029] Figure 3 A schematic diagram of the three-dimensional structure of a busbar bracket of a battery module assembly according to an embodiment of the utility model is shown.

[0030] Description of reference numerals:

[0031] 1. Battery module structure; 2. Liquid cooling plate; 3. Fastening connectors; 4. End plate; 41. End plate body; 42. Reinforcing rib plate; 5. Bus bracket; 6. Heat conducting layer; 7. Wire hole. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0033] like Figure 1 As shown, the utility model provides a battery module assembly, which includes:

[0034] Battery module structure 1;

[0035] The liquid cooling plate assembly wraps at least a portion of the battery module structure 1 . The liquid cooling plate assembly is used as a heat dissipation component of the battery module structure 1 and also serves as a structural reinforcement of the battery module structure 1 .

[0036] Specifically, in order to solve the problem that the existing heat dissipation system layout of the battery module assembly is insufficient and the battery module cannot be efficiently cooled, at the same time, the structural reinforcements of the existing battery module assembly, such as the structural reinforcements such as the reinforcing ribs or the cross beams, are designed and used separately from the liquid cooling system, and the layout space needs to be separately designed on the battery module assembly, resulting in the battery module assembly occupying a large space as a whole and having many types of parts, which will also lead to a sharp increase in cost. The utility model provides a battery module assembly, which can be applied to soft-pack batteries, and the liquid cooling plate assembly of the battery module assembly wraps at least a part of the battery module structure 1, and the liquid cooling plate assembly is used for the battery module structure 1 The liquid cooling plate assembly not only serves as a heat dissipation component but also serves as a structural reinforcement of the battery module structure 1. The liquid cooling plate assembly wraps the battery module structure 1 for heat dissipation, which effectively increases the heat dissipation area and maximizes the heat dissipation efficiency. At the same time, the liquid cooling plate assembly wrapping design can replace the original structural reinforcement. The strength of the liquid cooling plate assembly and the layout of the liquid cooling plate assembly can improve the overall strength and rigidity of the battery module assembly, so that it can meet the ability to cope with more severe working conditions. Furthermore, the original structural reinforcement can be cancelled to avoid the original structural reinforcement occupying a large space. At the same time, the types of parts of the battery module assembly are also reduced a lot, which reduces the production cost and ensures the heat dissipation capacity.

[0037] Preferably, the liquid cooling plate assembly comprises:

[0038] Four liquid cooling plates 2, the four liquid cooling plates 2 are respectively attached to the top, bottom and two side surfaces of the battery module structure 1, two adjacent liquid cooling plates 2 are connected to each other, and the liquid cooling plates 2 are used to communicate with the liquid cooling circulation system;

[0039] A plurality of fastening connectors 3 pass through the battery module structure 1 and are used to connect the top liquid cooling plate 2 and the bottom liquid cooling plate 2 .

[0040] Preferably, the battery module assembly further includes two end plates 4 , which are respectively connected to the two ends of the battery module structure 1 , and the end plates 4 are connected to the four liquid cooling plates 2 .

[0041] Specifically, the four liquid cooling plates 2 of the battery module assembly are wrapped on the battery module structure 1, and the top, bottom and two sides of the battery module structure 1 are cooled simultaneously, which effectively increases the heat dissipation area and maximizes the heat dissipation efficiency. At the same time, the two adjacent liquid cooling plates 2 of the battery module assembly are connected to each other, and the top liquid cooling plate 2 and the bottom liquid cooling plate 2 are connected by multiple fastening connectors 3, and the end plate 4 is connected to the four liquid cooling plates 2. The design of the battery module assembly can replace the original structural reinforcement. The strength of the liquid cooling plate 2 and the connection layout of the liquid cooling plate 2, the end plate 4 and the fastening connector 3 can improve the overall strength and rigidity of the battery module assembly, so that it can meet the ability to cope with more severe working conditions. Furthermore, the original structural reinforcement can be cancelled to avoid the original structural reinforcement occupying a large space. At the same time, the types of parts of the battery module assembly are also reduced a lot, which reduces the production cost and ensures the heat dissipation capacity.

[0042] The four liquid cooling plates 2 can be connected in series and then connected to the liquid cooling circulation system, or the top liquid cooling plate 2 of the four liquid cooling plates 2 can be connected in series with the liquid cooling plate 2 on one side, and the bottom liquid cooling plate 2 can be connected in series with the liquid cooling plate 2 on the other side, and then connected in parallel and then connected to the liquid cooling circulation system.

[0043] Preferably, the battery module assembly further includes:

[0044] Two heating elements, the two heating elements are respectively arranged on the top liquid cooling plate 2 and the bottom liquid cooling plate 2;

[0045] A plurality of temperature collection elements, wherein the plurality of temperature collection elements are distributed on the battery cell body of the battery module structure 1;

[0046] The controller is electrically connected to the heating element and the plurality of temperature collecting elements. The controller can receive signals detected by the plurality of temperature collecting elements and can send control instructions to the heating element.

[0047] Specifically, the heating element is a PTC heating element. Both the top liquid cooling plate 2 and the bottom liquid cooling plate 2 have built-in PTC heating elements for heating the battery module structure 1 when the temperature is low. When a certain temperature is reached, the battery is started, so that the battery is in a reasonable temperature range when it is started, thereby ensuring the battery starting performance.

[0048] Preferably, the battery module structure 1 comprises:

[0049] Battery module;

[0050] Two busbar brackets 5 are respectively arranged on two side surfaces of the battery module, and two ends of the busbar bracket 5 are respectively connected to the two end plates 4.

[0051] Two busbars are respectively connected to two busbar brackets 5, and the busbars are used to connect the tabs of the battery modules in series or in parallel.

[0052] Specifically, a card slot 8 is distributed on a side of the bus bracket 5 away from the battery module for supporting the battery module during welding. The card slot 8 adopts a square structure, which eliminates the defect of traditional circular positioning holes that require high precision of clamping tooling during positioning. The pole ears of the battery cell body benefit from the heat dissipation capacity of the liquid cooling plate 2, and the bus material selection can be lower, such as copper-aluminum composite or pure aluminum, which can effectively reduce the weight of the battery module structure 1, improve energy density and reduce costs.

[0053] like Figure 3 As shown, preferably, the busbar bracket 5 is provided with a plurality of wire holes 7, and the wire holes 7 are used to pass the collection wires of the temperature collection element, so that the temperature collection element is directly arranged on the battery body.

[0054] Specifically, conventional temperature acquisition elements are generally arranged at the bus position to collect the temperature of the battery cell body, which is not accurate enough in measuring the temperature of the battery cell body. The utility model reserves a wire hole 7 for temperature collection, and the temperature acquisition element is directly arranged on the battery cell body, which is more accurate in collecting the working temperature of the battery, thereby maximizing the battery performance while ensuring the battery safety and service life.

[0055] Preferably, a heat-conducting layer 6 is provided between the liquid cooling plate assembly and the battery module structure 1 , and the heat-conducting layer 6 is a heat-conducting pad layer or a heat-conducting adhesive layer.

[0056] Specifically, a heat-conducting layer 6 is provided between the top liquid cooling plate 2 and the battery module structure 1, and a heat-conducting layer 6 is provided between the bottom liquid cooling plate 2 and the battery module structure 1. Since the top liquid cooling plate 2 and the bottom liquid cooling plate 2 are connected by fastening connectors 3, the fastening connectors 3 can realize the compression of the liquid cooling plate 2, and the heat-conducting adhesive layer can be made of a material that has no adhesiveness at all, which is convenient for the later maintenance and replacement of the battery cell body of the battery module structure 1.

[0057] like Figure 2 As shown, preferably, the fastening connector 3 includes a fastening screw and a fastening nut, one end of the fastening screw passes through the top liquid cooling plate 2, the battery module structure 1 and the bottom liquid cooling plate 2, and is threadedly connected to the fastening nut.

[0058] Preferably, the end plate 4 comprises an end plate body 41 , which is a plastic end plate body, in which a pole nut is embedded, and an outer side of the end plate body 41 is covered with a reinforcing rib plate 42 , which is a metal reinforcing rib plate.

[0059] Specifically, due to insufficient strength of plastic and considering the requirements of space size, the end plate 4 of the traditional battery module assembly generally adopts metal parts as a whole, and covers the inner side with insulation material to insulate the module, so as to reduce the temperature difference between the battery cell body close to the end plate 4 and other battery cell bodies. However, because metal is conductive, it is necessary to set structures such as pole brackets on the metal end plate to ensure the insulation performance of the battery module assembly. Therefore, the utility model adopts a plastic end plate body as the main body, and wraps a layer of metal reinforcing rib plate on the outside. The metal reinforcing rib plate serves as the main strength structural member. The plastic end plate body serves as the main structural member and the embedded pole nut is used as the pole end. This can simplify the space of the battery module assembly and improve the commonality of the parts of the battery module assembly. At the same time, due to the low thermal conductivity of plastic, the problem of large temperature difference generated during the contact between the battery cell body close to the end plate 4 and the metal end plate can be solved, and there is no need to add insulation material.

[0060] Preferably, the liquid cooling plates 2 on both sides are aluminum liquid cooling plates.

[0061] Specifically, the use of an aluminum liquid cooling plate can achieve lightweighting of the liquid cooling plate assembly and provide support for the battery module structure 1 .

[0062] Preferably, two adjacent liquid cooling plates 2 are connected by fastening bolts, and the liquid cooling plate 2 and the end plate 4 are connected by fastening bolts.

[0063] Specifically, the four liquid cooling plates 2 are connected to each other with fastening bolts, and are connected to the end plate 4 with fastening bolts. The liquid cooling plate 2 not only acts as a heat dissipation component but also as a structural reinforcement to enhance the overall strength of the battery module assembly. At the same time, the end plate 4 is ensured to have sufficient strength during long-term use, while improving the stability performance and not causing any tearing to the pole ears of the battery cell body.

[0064] In summary, the battery module assembly provided by the utility model is structurally wrapped on the battery module structure 1 by four liquid cooling plates 2, and the top, bottom and two sides of the battery module structure 1 are simultaneously dissipated with heat, which effectively increases the heat dissipation area and maximizes the heat dissipation efficiency. At the same time, the two adjacent liquid cooling plates 2 of the battery module assembly are connected to each other, the top liquid cooling plate 2 and the bottom liquid cooling plate 2 are connected by multiple fastening connectors 3, and the end plate 4 is connected to the four liquid cooling plates 2. The design of the battery module assembly can replace the original structural reinforcement. The strength of the liquid cooling plate 2 and the connection layout of the liquid cooling plate 2, the end plate 4 and the fastening connector 3 can improve the overall strength and rigidity of the battery module assembly, so that it can meet the ability to cope with more severe working conditions. Furthermore, the original structural reinforcement can be cancelled to avoid the original structural reinforcement occupying a large space. At the same time, the types of parts of the battery module assembly are also reduced a lot, which reduces the production cost and ensures the heat dissipation capacity.

[0065] The above description of various embodiments of the utility model is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A battery module assembly, characterized in that: The battery module assembly includes: Battery module structure; A liquid cooling plate assembly wraps at least a portion of the battery module structure, a heat conducting layer is provided between the liquid cooling plate assembly and the battery module structure, and the liquid cooling plate assembly is used as a heat dissipation component of the battery module structure and also as a structural reinforcement of the battery module structure.

2. A battery module assembly according to claim 1, characterized in that: The liquid cooling plate assembly comprises: Four liquid cooling plates, the four liquid cooling plates are respectively attached to the top, bottom and two side surfaces of the battery module structure, two adjacent liquid cooling plates are connected to each other, and the liquid cooling plates are used to communicate with the liquid cooling circulation system; A plurality of fastening connectors pass through the battery module structure and are used to connect the liquid cooling plate at the top and the liquid cooling plate at the bottom.

3. A battery module assembly according to claim 2, characterized in that: The battery module assembly also includes two end plates, which are respectively connected to the two ends of the battery module structure, and the end plates are connected to the four liquid cooling plates.

4. A battery module assembly according to claim 2, characterized in that: The battery module assembly also includes: Two heating elements, the two heating elements are respectively arranged on the top liquid cooling plate and the bottom liquid cooling plate; A plurality of temperature collection elements, wherein the plurality of temperature collection elements are distributed on the battery cell body of the battery module structure; A controller is electrically connected to the heating element and the plurality of temperature collecting elements, and the controller is capable of receiving signals detected by the plurality of temperature collecting elements and sending control instructions to the heating element.

5. A battery module assembly according to claim 3, characterized in that: The battery module structure comprises: Battery module; Two busbar brackets, the two busbar brackets are respectively arranged on two sides of the battery module, and the two ends of the busbar bracket are respectively connected to the two end plates; Two busbars are respectively connected to the two busbar brackets, and the busbars are used to connect the pole ears of the battery module in series or in parallel.

6. A battery module assembly according to claim 2, characterized in that: The fastening connector includes a fastening screw and a fastening nut. One end of the fastening screw passes through the top liquid cooling plate, the battery module structure and the bottom liquid cooling plate, and is threadedly connected to the fastening nut.

7. A battery module assembly according to claim 3, characterized in that: The end plate comprises an end plate body, which is a plastic end plate body, a pole nut is embedded in the end plate body, and a reinforcing rib plate is coated on the outer side of the end plate body, which is a metal reinforcing rib plate.

8. The battery module assembly according to claim 2, characterized in that: The liquid cooling plates on both sides are aluminum liquid cooling plates.

9. A battery module assembly according to claim 3, characterized in that: Two adjacent liquid cooling plates are connected by fastening bolts, and the liquid cooling plate and the end plate are connected by fastening bolts.

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