Battery module

Abstract

The utility model belongs to the technical field of battery modules, and particularly relates to a battery module, which comprises a battery module, the battery module comprises a plurality of battery units arranged along a first direction, each battery unit comprises a fixed part and a battery cell, the fixed part comprises a positioning area, a first liquid inlet channel and a first liquid outlet channel, and the battery cell is arranged in the positioning area; a liquid inlet and a liquid outlet are formed in each module end plate; the plurality of liquid cooling plates are respectively arranged between the adjacent battery units and between the module end plate and the battery units, and each liquid cooling plate comprises a second liquid inlet channel, a liquid cooling flow channel and a second liquid outlet channel which are communicated in sequence; the liquid inlet, the second liquid inlet channel and the first liquid inlet channel are communicated, and the liquid outlet, the second liquid outlet channel and the first liquid outlet channel are communicated; the battery module has the beneficial effects that the heat generated in the charging and discharging processes of the battery module is timely transmitted to the liquid cooling plate through the large surface of the battery core, so that the quick cooling effect is realized, and the heat dissipation performance is improved.

Description

Technical Field

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

[0002] In the prior art, the composition of battery modules is diverse, among which the more common ones include multiple stacked battery cells, end plates and side plates for fixing the battery cells, and battery cell electrical connectors and collection parts. For the above-mentioned traditional structural battery modules, heat dissipation is achieved by a liquid cooling plate arranged at the bottom of the battery module or a liquid cooling plate arranged on the side of the battery module.

[0003] The above two types of liquid cooling plates can only dissipate heat on the bottom or side of the battery cell, and the heat exchange area with the battery cell is small, so the heat dissipation effect and efficiency are limited. In the related art, a liquid cooling method is proposed, which is arranged on the front side of the battery cell (that is, the side with the largest area of ​​the battery cell). That is, by arranging a liquid cooling plate between the side panels of the module, and by arranging the liquid inlet channel and the liquid outlet channel on the side panel, so as to achieve flow channel connection with the liquid cooling plate. In this method, the positioning requirements of the liquid cooling plate are relatively high. On the one hand, it is necessary to align with the water inlet and outlet of the side panel. On the other hand, the spacing between adjacent liquid cooling plates needs to be controlled within a reasonable error range. If the spacing is too large, it cannot fit with the battery cell and affects the heat dissipation effect. If the spacing is too small, it is easy to cause the battery cell to squeeze the liquid cooling plate, thereby damaging the liquid cooling plate and causing leakage. Utility Model Content

[0004] The purpose of the utility model is to provide a battery module for the above-mentioned existing technical problems, which can facilitate the assembly of the module and the positioning of the liquid cooling plate while achieving a better heat dissipation effect.

[0005] In view of this, the utility model provides a battery module comprising:

[0006] A battery module, the battery module includes a plurality of battery cells arranged along a first direction, the battery cells include a fixing member and a battery cell, the fixing member includes a positioning area, a first liquid inlet channel and a first liquid outlet channel, and the battery cell is installed in the positioning area;

[0007] A pair of module end plates, the pair of module end plates are respectively installed at two ends of the battery module along the first direction, and the module end plates are provided with a liquid inlet and a liquid outlet;

[0008] A plurality of liquid cooling plates are respectively arranged between adjacent battery cells and between the module end plate and the battery cells, and the liquid cooling plates include a second liquid inlet channel, a liquid cooling channel and a second liquid outlet channel which are connected in sequence; the liquid inlet, the second liquid inlet channel and the first liquid inlet channel are connected, and the liquid outlet, the second liquid outlet channel and the first liquid outlet channel are connected.

[0009] Furthermore, it also includes:

[0010] A binding member, which is disposed around a pair of module end plates, a plurality of battery cells and a plurality of liquid cooling plates, and applies a restraining force in a first direction;

[0011] Wherein, the fixing piece is provided with a positioning groove for engaging the binding piece.

[0012] Furthermore, the fixing member also includes:

[0013] The liquid cooling plate is installed in the limiting groove, and the liquid cooling plate is embedded in the fixing member.

[0014] Furthermore, it also includes:

[0015] A plurality of fixing screws are arranged through a pair of module end plates and a plurality of battery cells;

[0016] A plurality of nuts are connected with a plurality of fixing screw rods in corresponding threaded connection.

[0017] Furthermore, there are multiple liquid cooling channels, and the multiple liquid cooling channels are arranged in parallel.

[0018] Furthermore, the liquid cooling channel is a "J"-shaped structure.

[0019] Furthermore, a first sealing member is provided at a connection point between the first liquid inlet channel and the second liquid inlet channel and at a connection point between the first liquid outlet channel and the second liquid outlet channel.

[0020] Furthermore, the fixing member is provided with a mounting groove for mounting the first sealing member.

[0021] Furthermore, it also includes:

[0022] Two water nozzles, the two water nozzles are respectively arranged at the liquid inlet and the liquid outlet, the liquid inlet is connected with the second liquid inlet channel through the water nozzle, and the liquid outlet is connected with the second liquid outlet channel through the water nozzle;

[0023] Wherein, a second sealing member is provided at the connection between the water nozzle and the second liquid inlet channel and at the connection between the water nozzle and the second liquid outlet channel.

[0024] Furthermore, it also includes:

[0025] The upper cover is arranged above the battery module, a pair of module end plates and a plurality of liquid cooling plates.

[0026] The beneficial effects of the utility model are:

[0027] The heat generated by each battery cell in the battery module during the charging and discharging process is promptly transferred to the liquid cooling plate through the large surface of the battery cell, achieving rapid cooling and improving the heat dissipation performance of the battery module. The battery module is composed of a battery module and module end plates at both ends, and the battery module is composed of battery cells. The liquid cooling plate is sandwiched between two battery cells, and between the battery cells and the module end plates. Since the specifications of the battery cells are uniform, the spacing between the liquid cooling plates on both sides of the battery cells remains consistent, and there is no need to consider their positioning. In addition, the positioning area of ​​the fixings can be designed and manufactured according to different battery cell models, so that the battery cell composed of the battery cell and the fixings becomes a standard part, so that the battery module can meet the combination of any number of battery cells, eliminating the module structure design process, greatly shortening the production cycle, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 It is an exploded schematic diagram of the overall structure of the utility model;

[0030] Figure 3 It is a schematic diagram of the structure between the battery unit and the liquid cooling plate in the utility model;

[0031] Figure 4 It is a structural schematic diagram of the liquid cooling plate in the utility model;

[0032] Figure 5 It is a structural schematic diagram of the fixing member in the utility model;

[0033] The symbols in the figure are:

[0034] 1. Battery unit; 11. Fixing piece; 12. Battery cell; 13. Positioning area; 14. First liquid inlet; 15. First liquid outlet; 16. Positioning groove; 17. Mounting groove; 18. Limiting groove; 2. Module end plate; 3. Liquid cooling plate; 31. Second liquid inlet; 32. Liquid cooling channel; 33. Second liquid outlet; 4. Binding piece; 5. Fixing screw; 6. Nut; 7. First sealing piece; 8. Faucet; 81. Second sealing piece; 9. Upper cover. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] Embodiment 1:

[0038] This embodiment provides a battery module comprising:

[0039] A battery module, the battery module includes a plurality of battery cells 1 arranged along a first direction X, the battery cell 1 includes a fixing member 11 and a battery cell 12, the fixing member 11 includes a positioning area 13, a first liquid inlet channel 14 and a first liquid outlet channel 15, and the battery cell 12 is installed in the positioning area 13;

[0040] A pair of module end plates 2, the pair of module end plates 2 are respectively installed at two ends of the battery module along the first direction X, and the module end plates 2 are provided with a liquid inlet and a liquid outlet;

[0041] A plurality of liquid cooling plates 3 are respectively arranged between adjacent battery cells 1 and between the module end plate 2 and the battery cell 1. The liquid cooling plate 3 includes a second liquid inlet channel 31, a liquid cooling channel 32 and a second liquid outlet channel 33 which are connected in sequence; the liquid inlet, the second liquid inlet channel 31 and the first liquid inlet channel 14 are connected, and the liquid outlet, the second liquid outlet channel 33 and the first liquid outlet channel 15 are connected.

[0042] In this technical solution, if Figure 2As shown, the battery unit 1 is composed of a fixing 11 and a battery cell 12, and is a "convex" shaped structure. The structure is designed to reserve space for materials such as copper bars, wiring harnesses, and BMS required in the battery module, thereby improving space utilization and achieving an increase in the energy density of the battery module. The fixing 11 can be made of high-strength nylon plastic, ABS, cast aluminum, or aluminum alloy. A positioning area 13 for placing the battery cell 12 is provided in the middle of the fixing 11. The shape and size of the positioning area 13 are designed according to the model of the battery cell 12 to be installed. The battery cell 12 is installed in the positioning area 13, and the small faces of the battery cell 12 are respectively in contact with the inner wall of the positioning area 13 to ensure that the battery cell 12 is stably set in the positioning area 13. It is worth mentioning that when the fixing 11 is made of metal, an insulating sheet needs to be pasted in the area between the fixing 11 and the battery cell 12 to ensure the insulating contact between the battery cell 12 and the fixing 11.

[0043] When installing the battery module, according to the number of battery cells 12 required by the battery module, the corresponding number of battery cells 1 are arranged side by side along the first direction X, and the large surfaces of two adjacent battery cells 12 are arranged facing each other. A liquid cooling plate 3 is arranged between adjacent battery cells 1, and then module end plates 2 are arranged at both ends of the battery module along the first direction X, and a liquid cooling plate 3 is also arranged between the battery cell 1 and the end plate. The liquid cooling plate 3 can be welded by double-layer aluminum alloy plates or copper plates, and a liquid cooling channel 32 is provided inside the liquid cooling plate 3. The end plate, the liquid cooling plate 3 and the fixing member 11 can be fixed by welding, or they can be connected and fixed by setting fasteners. Through the above-mentioned structural design, the liquid cooling plate 3 can be in contact with the large surfaces of two adjacent battery cells 12, so that the heat generated by the battery cells 12 can be quickly dissipated through the liquid cooling plate 3, thereby improving the heat dissipation performance of the battery module.

[0044] The module end plate 2 is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet can be both provided on one of the module end plates 2, or respectively provided on two module end plates 2. The liquid inlet, the second liquid inlet channel 31 and the first liquid inlet channel 14 are connected, and the liquid outlet, the second liquid outlet channel 33 and the first liquid outlet channel 15 are connected. The coolant enters the battery module from the liquid inlet, and can flow through the first liquid inlet channel 14 on each fixing member 11 to the second liquid inlet channel 31 of each liquid cooling plate 3, and then flows into the liquid cooling channel 32 of the liquid cooling plate 3 through the second liquid inlet channel 31, and then flows out from the second liquid outlet channel 33 of the liquid cooling plate 3, and finally gathers at the liquid outlet for discharge, ensuring that each liquid cooling plate 3 can have a cooling and heat dissipation effect on the battery cell 12.

[0045] In summary, the heat generated by each battery cell 12 in the battery module during the charging and discharging process is promptly transferred to the liquid cooling plate 3 through the large surface of the battery cell 12, achieving a rapid cooling effect, effectively improving the heat dissipation performance of the battery module, and the battery module is composed of a battery module and module end plates 2 at both ends, and the battery module is composed of battery cells 1. The liquid cooling plate 3 is sandwiched between two battery cells 1, and between the battery cells 1 and the module end plates 2. Since the specifications of the battery cells 1 are uniform, the spacing between the liquid cooling plates 3 on both sides of the battery cells 1 remains consistent, and there is no need to consider their positioning. In addition, the positioning area 13 of the fixing part 11 can be designed and manufactured according to different battery cell 12 models, so that the battery cell 1 composed of the battery cell 12 and the fixing part 11 becomes a standard part, so that the battery module can meet the combination of any number of battery cells 12, eliminating the module structure design process, greatly shortening the production cycle, and improving production efficiency.

[0046] Embodiment 2:

[0047] This embodiment provides a battery module, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0048] Furthermore, it also includes:

[0049] A binding member 4, which is disposed around a pair of module end plates 2, a plurality of battery cells 1 and a plurality of liquid cooling plates 3, and applies a restraining force in a first direction X;

[0050] The fixing member 11 is provided with a positioning groove 16 for engaging the binding member 4 .

[0051] In the present technical solution, the binding member 4 can be a steel belt. According to the required number of battery cells 12, multiple battery cells 1 are arranged along the first direction X, and a liquid cooling plate 3 is arranged between each battery cell 1. Then, the binding member 4 is used to wrap and bind the battery cell 1 and the liquid cooling plate 3 as a whole, so as to position the liquid cooling plate 3 and the battery cell 1, which is helpful for the subsequent fixed connection between the fixing member 11 and the liquid cooling plate 3. When the steel belt is wrapped and bound to several battery cells 1 and several liquid cooling plates 3, it will be embedded in the positioning groove 16 of each fixing member 11. The positioning groove 16 is used to limit the steel belt to prevent the steel belt from shifting, which is helpful for improving the overall stability.

[0052] Furthermore, the fixing member 11 further includes:

[0053] The limiting groove 18 , the liquid cooling plate 3 is installed in the limiting groove 18 , and the liquid cooling plate 3 is embedded in the fixing member 11 .

[0054] like Figure 3As shown in the figure, a limiting groove 18 adapted to the shape of the liquid cooling plate 3 is provided on the fixing member 11, so that the liquid cooling plate 3 can be embedded in the fixing member 11. On the one hand, it is convenient for the installation and positioning of the liquid cooling plate 3, ensuring that the large surface of the liquid cooling plate 3 is kept in contact with the battery cell 12, and ensuring that the heat of the battery cell 12 can be discharged in time and quickly during the charging and discharging process. On the other hand, the liquid cooling plate 3 does not protrude from the end face of the fixing member 11, ensuring that the adjacent fixing members 11 can be kept in contact with each other, so that the structure of the battery module is more compact and the space utilization rate is improved.

[0055] Embodiment 3:

[0056] This embodiment provides a battery module, which, in addition to including the technical solutions of the above embodiments, also has the following technical features.

[0057] Furthermore, it further includes:

[0058] A plurality of fixing screws 5, and the plurality of fixing screws 5 pass through a pair of module end plates 2 and a plurality of battery units 1;

[0059] A plurality of nuts 6, and the plurality of nuts 6 are threadedly connected to the plurality of fixing screws 5 correspondingly.

[0060] In this technical solution, the length of the fixing screw 5 is set according to the number of battery units 1. A screw head with an integral structure is provided at one end of the fixing screw 5, and a thread structure capable of realizing threaded connection with the nut 6 is provided at the other end. As Figure 2 shown in the figure, a plurality of mutually corresponding and communicating connection holes are provided on both the module end plate 2 and the fixing member 11. After the battery units 1 are wound and bound together by the binding member 4, the module end plates 2 are arranged on both sides. Then, through the connection holes provided on the module end plate 2 and the fixing member 11, the plurality of fixing screws 5 are passed through the module end plate 2 and the fixing member 11, and then the nut 6 is threadedly connected to the screw, so as to realize the fixed connection between the module end plate 2 and the fixing member 11.

[0061] Through the above structural design, the module end plate 2, the liquid cooling plate 3 and the battery unit 1 are detachably connected, which is convenient for the staff to assemble the battery module and improves the production efficiency; and when individual battery cells 12 in the battery module are damaged, it is also convenient to disassemble and replace them for maintenance, with high practicability.

[0062] Embodiment 4:

[0063] This embodiment provides a battery module, which, in addition to including the technical solutions of the above embodiments, also has the following technical features.

[0064] Furthermore, the number of the liquid cooling channels 32 is multiple, and the multiple liquid cooling channels 32 are arranged in parallel.

[0065] In the present technical solution, a plurality of liquid cooling channels 32 arranged in parallel can be designed in the liquid cooling plate 3 according to the size and shape of the liquid cooling plate 3, so as to increase the flow rate of the coolant in the liquid cooling plate 3 and improve the cooling and heat dissipation effect of the liquid cooling plate 3. Furthermore, the liquid cooling channel 32 is a "J"-shaped structure. The contact area between a single liquid cooling channel 32 and the battery cell 12 is increased to ensure that the coolant in the liquid cooling channel 32 can fully contact the battery cell 12, thereby enhancing the cooling and heat dissipation effect.

[0066] Embodiment 5:

[0067] This embodiment provides a battery module, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] Furthermore, a first sealing member 7 is provided at the connection between the first liquid inlet channel 14 and the second liquid inlet channel 31 and at the connection between the first liquid outlet channel 15 and the second liquid outlet channel 33 .

[0069] In the present technical solution, the first sealing member 7 may be a sealing ring made of rubber material, which is used to ensure the connection sealing between the first liquid inlet channel 14 and the second liquid inlet channel 31 and the connection sealing between the first liquid outlet channel 15 and the second liquid outlet channel 33, thereby avoiding leakage of the coolant and having high practicality.

[0070] Furthermore, the fixing member 11 is provided with a mounting groove 17 for mounting the first sealing member 7. The sealing ring is located in the mounting groove 17, and the structure of the mounting groove 17 and the sealing ring adaptability play a positioning role in the installation of the sealing ring, which is convenient for the staff to install the sealing ring. It can also ensure that the sealing ring can be stably arranged at the connection between the first liquid inlet channel 14 and the second liquid inlet channel 31 and the connection between the first liquid outlet channel 15 and the second liquid outlet channel 33, avoiding unnecessary displacement of the sealing ring during the installation or use of the battery module, and preventing the sealing performance from being affected.

[0071] Embodiment 6:

[0072] This embodiment provides a battery module, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0073] Furthermore, it also includes:

[0074] Two water nozzles 8, the two water nozzles 8 are respectively arranged at the liquid inlet and the liquid outlet, the liquid inlet is connected with the second liquid inlet channel 31 through the water nozzle 8, and the liquid outlet is connected with the second liquid outlet channel 33 through the water nozzle 8;

[0075] A second sealing member 81 is disposed at the connection between the water nozzle 8 and the second liquid inlet channel 31 and at the connection between the water nozzle 8 and the second liquid outlet channel 33 .

[0076] In the present technical solution, the water nozzle 8 is provided to facilitate the access of the coolant to the liquid inlet of the battery module and the discharge of the coolant from the liquid outlet, which is helpful for the maintenance and repair of the battery module. When it is necessary to discharge the coolant or flush the system, the water nozzle 8 can provide a convenient operation point to reduce the operation time and labor cost. A second sealing member 81 is provided at the connection between the water nozzle 8 and the second liquid inlet channel 31 and at the connection between the water nozzle 8 and the second liquid outlet channel 33. The second sealing member 81 can also be a sealing ring made of rubber material to ensure the connection sealing between the water nozzle 8 and the second liquid inlet channel 31 of the liquid cooling plate 3 and the connection sealing between the water nozzle 8 and the second liquid outlet channel 33 of the liquid cooling plate 3 to prevent leakage of the coolant.

[0077] Embodiment 7:

[0078] This embodiment provides a battery module, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0079] Furthermore, it also includes:

[0080] The upper cover 9 is disposed above the battery module, a pair of module end plates 2 and a plurality of liquid cooling plates 3 .

[0081] In the present technical solution, the upper cover 9 is provided to protect the battery cells 12 of the battery module, thereby preventing the battery cells 12 from being damaged by external objects, thereby ensuring the safety of the battery module.

[0082] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery module, characterized in that: include: A battery module, the battery module comprising a plurality of battery units (1) arranged along a first direction (X), the battery unit (1) comprising a fixing member (11) and a battery cell (12), the fixing member (11) comprising a positioning area (13), a first liquid inlet channel (14) and a first liquid outlet channel (15), the battery cell (12) being installed in the positioning area (13); A pair of module end plates (2), the pair of module end plates (2) being respectively mounted at two ends of the battery module along a first direction (X), and the module end plates (2) being provided with a liquid inlet and a liquid outlet; A plurality of liquid cooling plates (3), wherein the plurality of liquid cooling plates (3) are respectively arranged between adjacent battery cells (1) and between a module end plate (2) and a battery cell (1), wherein the liquid cooling plates (3) comprise a second liquid inlet channel (31), a liquid cooling channel (32) and a second liquid outlet channel (33) which are connected in sequence; the liquid inlet, the second liquid inlet channel (31) and the first liquid inlet channel (14) are connected, and the liquid outlet, the second liquid outlet channel (33) and the first liquid outlet channel (15) are connected.

2. The battery module according to claim 1, characterized in that: Also includes: A binding member (4), the binding member (4) being arranged around a pair of module end plates (2), a plurality of battery cells (1) and a plurality of liquid cooling plates (3), and applying a restraining force in a first direction (X); Wherein, the fixing member (11) is provided with a positioning groove (16) for engaging the binding member (4).

3. The battery module according to claim 1, characterized in that: The fixing member (11) further comprises: A limiting groove (18), the liquid cooling plate (3) is installed in the limiting groove (18), and the liquid cooling plate (3) is embedded in the fixing member (11).

4. The battery module according to claim 1, characterized in that: Also includes: A plurality of fixing screws (5), wherein the plurality of fixing screws (5) are arranged through a pair of module end plates (2) and a plurality of battery cells (1); A plurality of nuts (6), wherein the plurality of nuts (6) are correspondingly threadedly connected with the plurality of fixing screw rods (5).

5. The battery module according to claim 1, characterized in that: The number of the liquid cooling channels (32) is multiple, and the multiple liquid cooling channels (32) are arranged in parallel.

6. The battery module according to claim 5, characterized in that: The liquid cooling channel (32) is a "J"-shaped structure.

7. The battery module according to claim 1, characterized in that: A first sealing member (7) is provided at the connection between the first liquid inlet channel (14) and the second liquid inlet channel (31), and at the connection between the first liquid outlet channel (15) and the second liquid outlet channel (33).

8. The battery module according to claim 7, characterized in that: The fixing member (11) is provided with a mounting groove (17) for mounting the first sealing member (7).

9. The battery module according to claim 1, characterized in that: Also includes: Two water nozzles (8), the two water nozzles (8) being respectively arranged at the liquid inlet and the liquid outlet, the liquid inlet being connected to the second liquid inlet channel (31) through the water nozzle (8), and the liquid outlet being connected to the second liquid outlet channel (33) through the water nozzle (8); Wherein, a second sealing member (81) is provided at the connection between the water nozzle (8) and the second liquid inlet channel (31) and at the connection between the water nozzle (8) and the second liquid outlet channel (33).

10. The battery module according to claim 1, characterized in that: Also includes: An upper cover (9) is arranged above the battery module, a pair of module end plates (2) and a plurality of liquid cooling plates (3).

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