Battery cell module structure and battery pack

Abstract

The embodiment of the utility model provides a battery cell module structure and a battery pack, and relates to the field of battery packs. The battery module liquid cooling system aims at solving the problem that a battery module liquid cooling system is tedious to install and overhaul. The battery cell module structure comprises an upper-layer module, a lower-layer module and a liquid cooling plate, and a pressure release valve of the upper-layer module is arranged at the top; the lower-layer module is fixed below the upper-layer module, and a pressure release valve of the lower-layer module is arranged at the bottom; the liquid cooling plate is fixed between the upper layer module and the lower layer module. The battery pack comprises the battery cell module structure. The liquid cooling plate is arranged between the upper-layer module and the lower-layer module, the upper-layer module and the lower-layer module of the battery pack share one set of liquid cooling plate, the liquid cooling system is simple in structure and convenient to install, and the whole liquid cooling system is low in cost.

Description

Technical Field

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

[0002] In a battery pack, when the internal pressure exceeds a certain threshold, the pressure relief valve will automatically open to release the internal pressure to prevent the battery pack from exploding due to excessive pressure. The main function of the liquid cooling plate is to control the temperature of the battery pack to prevent the battery from overheating and causing safety accidents. Therefore, the liquid cooling plate and the pressure relief valve are both important guarantees for the safety performance of the battery pack.

[0003] In the prior art, liquid cooling plates and pressure relief valves are usually integrated into the thermal management system of the battery pack. By precisely controlling the temperature and flow of the coolant, and reasonably setting the opening pressure and threshold of the pressure relief valve, dual control of the battery pack temperature and pressure can be achieved, thereby improving the safety performance and reliability of the battery pack. In the prior art, multiple liquid cooling plates are also set in the battery pack corresponding to multiple modules, which can achieve all-round cooling, but this method also increases costs, and installation and maintenance are more cumbersome. Utility Model Content

[0004] The purpose of the utility model includes, for example, providing a battery cell module structure, which can improve the problem of complicated installation and maintenance of the battery module liquid cooling system.

[0005] The purpose of the utility model also includes providing a battery pack that can solve the problem of complicated installation and maintenance of the battery module liquid cooling system.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the utility model provides a battery cell module structure, including an upper module, a lower module and a liquid cooling plate, wherein the pressure relief valve of the upper module is arranged at the top; the lower module is fixed below the upper module, and the pressure relief valve of the lower module is arranged at the bottom; the liquid cooling plate is fixed between the upper module and the lower module.

[0008] In addition, the battery cell module structure provided by the embodiment of the utility model may also have the following additional technical features:

[0009] Optionally, the positive and negative tabs of the battery cells of the upper module are located on two opposite sides of the upper module, and the positive and negative tabs of the battery cells of the lower module are located on two opposite sides of the lower module.

[0010] Optionally, the battery core module structure further includes a thermal pad; the thermal pad is filled between the liquid cooling plate and the upper module, and the thermal pad is filled between the liquid cooling plate and the lower module.

[0011] Optionally, the liquid cooling plate includes a harmonica tube and a connecting tube; the number of the harmonica tubes is multiple, the multiple harmonica tubes are fixed side by side, and the multiple harmonica tubes are connected to the connecting tube, and the connecting tube is used to input or output cooling liquid.

[0012] Optionally, the upper module includes a plurality of first square battery cells, and the plurality of first square battery cells are arranged in sequence.

[0013] Optionally, the lower module includes a plurality of second square battery cells, and the plurality of second square battery cells are arranged in sequence.

[0014] An embodiment of the utility model further provides a battery pack, which includes a housing and a plurality of battery cell module structures, wherein the plurality of battery cell module structures are arranged side by side.

[0015] Optionally, the battery cell module structure further includes a reinforcing plate; the upper modules between two adjacent battery cell module structures are connected via the reinforcing plate.

[0016] Optionally, the battery pack further includes a plurality of long screws, the upper module, the lower module and the outer shell are fixed together by passing through the long screws, and the reinforcing plate is passed through and fixed on the long screws.

[0017] Optionally, the battery pack also includes a quick-change electrical plug-in and a quick-change water pipe connector, which are fixed on the outer shell and located on one side of the multiple battery cell module structures, and the quick-change electrical plug-in and the quick-change water pipe connector are connected to the liquid cooling plate.

[0018] The beneficial effects of the battery cell module structure and the battery pack of the embodiment of the utility model include, for example:

[0019] The battery cell module structure includes an upper module, a lower module and a liquid cooling plate. The pressure relief valve of the upper module is arranged at the top; the lower module is fixed under the upper module, and the pressure relief valve of the lower module is arranged at the bottom; the liquid cooling plate is fixed between the upper module and the lower module.

[0020] The pressure relief valve of the lower module cell faces downward, and the pressure relief valve of the upper module cell faces upward. A liquid cooling plate is arranged between the upper module and the lower module. The upper and lower modules of the battery pack share a set of liquid cooling plates. The liquid cooling system has a simple structure and is easy to install. The cost of the entire liquid cooling system is low. It has strong expandability, and more heat dissipation needs can be met by simply lengthening the liquid cooling plate or increasing the number of liquid cooling plates.

[0021] The battery pack, including the above-mentioned battery cell module structure, can improve the problem of complicated installation and maintenance of the battery module liquid cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the overall structure of the battery pack provided in this embodiment;

[0024] Figure 2 A schematic diagram of the internal structure of the battery pack provided in this embodiment;

[0025] Figure 3 A schematic structural diagram of the first part of the battery cell module structure provided in this embodiment;

[0026] Figure 4 A schematic structural diagram of the second part of the battery cell module structure provided in this embodiment;

[0027] Figure 5 A schematic diagram of the structure of the expanded battery cell module provided in this embodiment.

[0028] Icons: 10-cell module structure; 11-battery pack; 13-housing; 100-upper module; 110-lower module; 120-square cell; 200-pressure relief valve; 220-liquid cooling plate; 221-harmonica tube; 222-connecting tube; 230-thermal pad; 240-reinforcement plate; 250-long screw; 260-quick-change electrical plug-in; 270-quick-change water pipe connector. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] Combine the following Figures 1 to 5 The battery cell module structure 10 provided in this embodiment is described in detail.

[0036] Please refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 An embodiment of the utility model provides a battery cell module structure 10, including an upper module 100, a lower module 110 and a liquid cooling plate 220, wherein the pressure relief valve 200 of the upper module 100 is arranged at the top; the lower module 110 is fixed below the upper module 100, and the pressure relief valve 200 of the lower module 110 is arranged at the bottom; the liquid cooling plate 220 is fixed between the upper module 100 and the lower module 110.

[0037] The battery pack 11 includes several modules, and the modules are divided into an upper and lower layer design. The battery cell pressure relief valve 200 of the upper module 100 is located on the upper surface of the upper module 100, and the battery cell pressure relief valve 200 of the lower module 110 is located on the lower surface of the lower module 110. The battery cell pressure relief valve 200 of the lower module 110 faces downward, and the battery cell pressure relief valve 200 of the upper module 100 faces upward. A liquid cooling plate 220 is arranged between the upper module 100 and the lower module 110.

[0038] The upper module 100 and the lower module 110 of the battery pack 11 share a set of liquid cooling plates 220. The liquid cooling system has a simple structure and is easy to install. The cost of the entire liquid cooling system is low. It has strong expandability. It only needs to lengthen the liquid cooling plate 220 or increase the number of liquid cooling plates 220 to meet more heat dissipation needs. When the number of module cells increases, it only needs to lengthen the liquid cooling plate 220 to meet the heat dissipation needs. When the number of modules increases, it only needs to increase the number of liquid cooling plates 220 to meet the heat dissipation needs. It has strong expandability.

[0039] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the positive and negative tabs of the battery cells of the upper module 100 are located on opposite sides of the upper module 100 , and the positive and negative tabs of the battery cells of the lower module 110 are located on opposite sides of the lower module 110 .

[0040] The positive and negative tabs of the battery cell are located on both sides of the module. Specifically, the positive tab of the battery cell is located on one side of the module, and the negative tab of the battery cell is located on the other side of the module. The battery cell pressure relief valve 200 is located at the top or bottom of the module. The battery cell pressure relief valve 200 of the upper module 100 is located at the top of the upper module 100, and the battery cell pressure relief valve 200 of the lower module 110 is located at the bottom of the lower module 110. It is convenient to share a liquid cooling plate 220 for dark switching.

[0041] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the battery module structure 10 further includes a thermal pad 230; the thermal pad 230 is filled between the liquid cooling plate 220 and the upper module 100, and the thermal pad 230 is filled between the liquid cooling plate 220 and the lower module 110. The thermal pad 230 is filled between the liquid cooling plate 220 and the module battery, and the thermal pad 230 is used to transfer the heat of the battery to the liquid cooling plate 220 for heat exchange and cooling.

[0042] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5In this embodiment, the liquid cooling plate 220 includes a harmonica tube 221 and a connecting tube 222; the number of the harmonica tubes 221 is multiple, the multiple harmonica tubes 221 are fixed side by side, and the multiple harmonica tubes 221 are connected to the connecting tube 222, and the connecting tube 222 is used to input or output the cooling liquid.

[0043] The liquid cooling plate 220 using the harmonica tube 221 usually uses a relatively simple structure and materials, so its manufacturing cost is relatively low. Since the harmonica tube 221 design itself is relatively compact and uses less material, the overall weight of the liquid cooling plate 220 is also relatively light, which is particularly important for application scenarios that require weight control. The structure of the harmonica tube 221 liquid cooling plate 220 is relatively simple, which makes its production and maintenance process relatively easy.

[0044] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the upper module 100 includes a plurality of first square cells, which are arranged in sequence. Each module is composed of a plurality of square cells 120 arranged in sequence.

[0045] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the lower module 110 includes a plurality of second square cells, which are arranged in sequence. Each module is composed of a plurality of square cells 120 arranged in sequence.

[0046] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 The embodiment of the utility model further provides a battery pack 11, which includes a housing 13 and a plurality of battery cell module structures 10, and the plurality of battery cell module structures 10 are arranged side by side.

[0047] When the number of module cells increases, the heat dissipation requirements can be met by simply lengthening the liquid cooling plate 220 ; when the number of modules increases, the heat dissipation requirements can be met by simply increasing the number of liquid cooling plates 220 , which has strong expandability.

[0048] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the battery cell module structure 10 further includes a reinforcing plate 240 ; the upper modules 100 between two adjacent battery cell module structures 10 are connected via the reinforcing plate 240 .

[0049] Adjacent modules are connected by a reinforcing plate 240 to increase the overall rigidity of the battery pack 11. Both ends of the reinforcing plate 240 are respectively fixed to the adjacent upper modules 100. Two adjacent lower modules 110 are also connected and fixed by the reinforcing plate 240.

[0050] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the battery pack 11 further includes a plurality of long screws 250 , the upper module 100 , the lower module 110 and the housing 13 are fixed together by the long screws 250 , and the reinforcing plate 240 is fixed on the long screws 250 .

[0051] The upper module 100 and the lower module 110 are fixed to the bottom plate of the battery pack 11 shell by long screws 250, and the long screws 250 also pass through the reinforcing plate 240 to achieve precise positioning and fixation.

[0052] Reference Figure 1 and Figure 2 In this embodiment, the battery pack 11 also includes a quick-change electrical plug-in 260 and a quick-change water pipe connector 270. The quick-change electrical plug-in 260 and the quick-change water pipe connector 270 are fixed on the outer shell 13 and are located on one side of the multiple battery cell module structure 10. The quick-change electrical plug-in 260 and the quick-change water pipe connector 270 are connected to the liquid cooling plate 220.

[0053] The quick-change electrical plug-in 260 and the quick-change water pipe connector 270 are uniformly arranged on one side of the plurality of battery cell module structures 10 for easy management and installation.

[0054] According to a battery cell module structure 10 provided in this embodiment, the working principle of the battery cell module structure 10 is:

[0055] Each module is composed of several square cells 120 arranged in sequence, with the positive and negative ears of the cells located on both sides of the module, and the cell pressure relief valve 200 located on the upper surface of the module. The battery pack 11 contains several modules, and the modules are divided into upper and lower layers. The cell pressure relief valve 200 of the lower module 110 faces downward, and the cell pressure relief valve 200 of the upper module 100 faces upward. A liquid cooling plate 220 is arranged between the upper and lower modules, and a thermal pad 230 is filled between the liquid cooling plate 220 and the module cells. The upper and lower modules are fixed to the bottom plate of the battery pack 11 shell by long screws 250, and the adjacent modules are connected by reinforcing plates 240 to increase the overall rigidity of the battery pack 11; when the number of module cells increases, it only needs to lengthen the length of the liquid cooling plate 220 to meet the heat dissipation requirements; when the number of modules increases, it only needs to increase the number of liquid cooling plates 220 to meet the heat dissipation requirements, and it has strong expandability.

[0056] The battery cell module structure 10 provided in this embodiment has at least the following advantages:

[0057] The battery cell pressure relief valve 200 of the lower module 110 faces downward, and the battery cell pressure relief valve 200 of the upper module 100 faces upward. A liquid cooling plate 220 is arranged between the upper module 100 and the lower module 110. The upper and lower modules 110 of the battery pack 11 share a set of liquid cooling plates 220. The liquid cooling system has a simple structure and is easy to install. The cost of the entire liquid cooling system is low. It has strong expandability, and more heat dissipation needs can be met by simply lengthening the liquid cooling plate 220 or increasing the number of liquid cooling plates 220.

[0058] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A battery module structure, characterized in that: include: An upper module (100), wherein a pressure relief valve (200) of the upper module (100) is arranged at the top; A lower module (110), wherein the lower module (110) is fixed below the upper module (100), and a pressure relief valve (200) of the lower module (110) is arranged at the bottom; and a liquid cooling plate (220), wherein the liquid cooling plate (220) is fixed between the upper module (100) and the lower module (110).

2. The battery cell module structure according to claim 1, characterized in that: The positive and negative electrode tabs of the battery cells of the upper module (100) are located on two opposite sides of the upper module (100), and the positive and negative electrode tabs of the battery cells of the lower module (110) are located on two opposite sides of the lower module (110).

3. The battery cell module structure according to claim 1, characterized in that: The battery core module structure also includes a thermal pad (230); the thermal pad (230) is filled between the liquid cooling plate (220) and the upper module (100), and the thermal pad (230) is filled between the liquid cooling plate (220) and the lower module (110).

4. The battery cell module structure according to claim 1, characterized in that: The liquid cooling plate (220) comprises a harmonica tube (221) and a connecting tube (222); the number of the harmonica tubes (221) is multiple, the multiple harmonica tubes (221) are fixed side by side, and the multiple harmonica tubes (221) are connected to the connecting tube (222), and the connecting tube (222) is used to input or output cooling liquid.

5. The battery cell module structure according to any one of claims 1 to 4, characterized in that: The upper module (100) comprises a plurality of first square battery cells, and the plurality of first square battery cells are arranged in sequence.

6. The battery cell module structure according to any one of claims 1 to 4, characterized in that: The lower layer module (110) comprises a plurality of second square battery cells, and the plurality of second square battery cells are arranged in sequence.

7. A battery pack, characterized in that: The battery pack comprises a housing (13) and a plurality of battery cell module structures according to any one of claims 1 to 6, wherein the plurality of battery cell module structures are arranged side by side.

8. The battery pack according to claim 7, characterized in that: The battery cell module structure further comprises a reinforcing plate (240); the upper modules (100) between two adjacent battery cell module structures are connected via the reinforcing plate (240).

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises a plurality of long screws (250), the upper module (100), the lower module (110) and the outer shell (13) are fixed together by passing through the long screws (250), and the reinforcing plate (240) is passed through and fixed on the long screws (250).

10. The battery pack according to claim 8, characterized in that: The battery pack further comprises a quick-change electrical plug-in (260) and a quick-change water pipe connector (270), wherein the quick-change electrical plug-in (260) and the quick-change water pipe connector (270) are fixed on the housing (13) and are located on one side of the plurality of battery cell module structures, and the quick-change electrical plug-in (260) and the quick-change water pipe connector (270) are connected to the liquid cooling plate (220).

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