Battery modules, battery packs and vehicles

Abstract

The utility model discloses a battery module, a battery pack and a vehicle. The battery module comprises: a box body, in which a receiving cavity is arranged; at least one battery cell assembly, at least one battery cell assembly is arranged in the receiving cavity, each battery cell assembly comprises two battery cell groups and a liquid cooling plate connected between the two battery cell groups, each battery cell group comprises a plurality of battery cells arranged in sequence along the extension direction of the liquid cooling plate, the pole of each battery cell faces away from the liquid cooling plate in the same battery cell assembly, and each liquid cooling plate is perpendicular to the bottom wall of the box body; a plurality of anti-expansion plates, the plurality of anti-expansion plates are arranged in sequence, and two adjacent anti-expansion plates are arranged at intervals to form a fixed groove, the anti-expansion plate is fixedly connected to the inner wall of the box body, and abuts against the end of the battery cell group in the extension direction, and the liquid cooling plate is clamped in the fixed groove; a liquid inlet pipe, connected to the liquid inlet of each liquid cooling plate and passes through the box body; a liquid outlet pipe, connected to the liquid outlet of each liquid cooling plate and passes through the box body.

Description

Technical Field

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

[0002] Currently, the industry's mainstream power battery architecture is based on an upright cell layout, with the cell poles positioned vertically upward. There are two main cell cooling solutions: bottom-of-cell cooling, which typically uses stamped liquid cooling plates. This is costly, heavy, and located at the bottom of the battery, creating a risk of leakage. Side-of-cell cooling, however, requires two side-of-cell liquid cooling plates for each cell, resulting in a high number of plates, high cost, and high weight. Utility Model Content

[0003] In view of this, the present invention provides a battery module, a battery pack and a vehicle to solve the above technical problems.

[0004] The battery module provided by the utility model includes:

[0005] A box body, wherein a receiving cavity is provided in the box body;

[0006] At least one battery cell assembly, at least one battery cell assembly is disposed in the accommodating cavity, each battery cell assembly includes two battery cell groups and a liquid cooling plate connected between the two battery cell groups, each battery cell group includes a plurality of battery cells arranged in sequence along the extension direction of the liquid cooling plate, and the poles of each battery cell are all facing away from the liquid cooling plate in the same battery cell assembly, and each liquid cooling plate is perpendicular to the bottom wall of the box body;

[0007] A plurality of anti-expansion plates, the plurality of anti-expansion plates are arranged in sequence, and adjacent two anti-expansion plates are spaced apart to form a fixing groove, the anti-expansion plates are fixedly connected to the inner wall of the box body and abut against the end of the battery cell group in the extension direction, and the liquid cooling plate is clamped in the fixing groove;

[0008] a liquid inlet pipe, the liquid inlet pipe being connected to the liquid inlet of each liquid cooling plate and passing through the box;

[0009] A liquid outlet pipe is connected to the liquid outlet of each liquid cooling plate and passes through the box.

[0010] Optionally, the battery module further includes a reinforcing plate connected to the anti-expansion plate and the battery cell.

[0011] Optionally, the width of the reinforcing plate is greater than or equal to twice the thickness of the liquid cooling plate.

[0012] Optionally, the reinforcing plate is adhesively connected to the anti-expansion plate and the battery core, and is bolted to the anti-expansion plate.

[0013] Optionally, the surface of the reinforcing plate is covered with an insulating layer.

[0014] Optionally, the battery module further includes a reinforcing beam connected to the inner wall of the box.

[0015] Optionally, the box includes:

[0016] A lower box body, wherein a accommodating groove is provided on one side surface of the lower box body;

[0017] A cover plate covers the accommodating groove and is detachably connected to the lower box body. The cover plate and the lower box body enclose the accommodating cavity.

[0018] The present invention also provides a battery pack, comprising at least one battery module as described in any one of the above items.

[0019] The utility model also provides a vehicle, comprising the battery pack described above.

[0020] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects:

[0021] By adopting the battery module, battery pack and vehicle of the present invention, the liquid cooling plate is vertically clamped between the two battery cell groups and stably clamped in the fixing groove between the two adjacent anti-expansion plates. There is no need to lay it on the bottom of the battery, and there is no risk of collision and leakage. Moreover, one liquid cooling plate can be used to cool the two battery cell groups on both sides at the same time, which reduces the number of liquid cooling plates used, reduces the weight, and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an exploded view of a battery module according to one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of a cell assembly of the battery module shown;

[0024] Figure 3 for Figure 1 Schematic diagram of the battery cell assembly installed in the box.

[0025] Reference numerals:

[0026] 1: Box body; 101: Lower box body; 2: Battery cell assembly; 201: Battery cell group; 2011: Battery cell; 202: Liquid cooling plate; 3: Liquid inlet pipe; 4: Liquid outlet pipe; 5: Anti-expansion plate; 501: Fixing groove; 6: Reinforcement beam; 7: Reinforcement plate. DETAILED DESCRIPTION

[0027] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0028] It is easy to understand that according to the technical solution of the present invention, a variety of structural methods and implementation methods can be replaced by those skilled in the art without changing the essential spirit of the present invention. Therefore, the following specific embodiments and drawings are only illustrative of the technical solution of the present invention and should not be regarded as the entire present invention or as a limitation or restriction of the technical solution of the utility model.

[0029] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the drawings. They are relative concepts and may vary depending on the location and usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0030] Figure 1 This is an exploded view of a battery module according to one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of a cell assembly of the battery module shown; Figure 3 for Figure 1 Schematic diagram of the battery cell assembly installed in the box.

[0031] like Figure 1-Figure 3 As shown, the battery module includes a box body 1, at least one battery cell assembly 2, multiple anti-expansion plates 5, a liquid inlet pipe 3 and a liquid outlet pipe 4.

[0032] The box body 1 is provided with a receiving cavity; at least one cell assembly 2 is provided in the receiving cavity, each cell assembly 2 includes two cell groups 201 and a liquid cooling plate 202 connected between the two cell groups 201, each cell group 201 includes a plurality of cells 2011 arranged in sequence along the extension direction of the liquid cooling plate 202, and the poles of each cell 2011 are all facing away from the liquid cooling plate 202 in the same cell assembly 2, and each liquid cooling plate 202 is perpendicular to the box body. 1; a plurality of anti-expansion plates 5 are arranged in sequence, and adjacent two anti-expansion plates 5 are spaced apart to form a fixing groove 501, the anti-expansion plate 5 is fixedly connected to the inner wall of the box body 11, and abuts against the end of the battery cell group 201 in the extension direction, and the liquid cooling plate 202 is clamped in the fixing groove 501; the liquid inlet pipe 3 is connected to the liquid inlet of each liquid cooling plate 202 and passes through the box body 1; the liquid outlet pipe 4 is connected to the liquid outlet of each liquid cooling plate 202 and passes through the box body 1.

[0033] During use, each of the battery cell assemblies 2 is sequentially placed in the accommodating cavity of the box 1, with the liquid cooling plate 202 perpendicular to the bottom wall of the box 1. A battery cell group 201 is connected to opposite sides of the liquid cooling plate 202 in each battery cell assembly 2, and the poles of the battery cells 2011 in each battery cell group 201 face away from the liquid cooling plate 202. That is, the poles of each battery cell 2011 are arranged parallel to the bottom wall of the box 1. After the battery cell assembly 2 is placed in the box 1, one end of each battery cell group 201 is in contact with the inner wall of the box 1. The anti-expansion plates 5 are positioned so that multiple anti-expansion plates 5 are spaced apart and abut the other end of the battery cell group 201. The liquid cooling plate 202 in each battery cell assembly 2 passes through the fixing grooves 501 between adjacent anti-expansion plates 5 at corresponding positions and is clamped within the corresponding fixing grooves 501. This allows the liquid cooling plate 202 to remain stable under the dual clamping action of the battery cell groups 201 and the fixing grooves 501 on both sides. Simultaneously, the abutment between the anti-expansion plates 5 and the ends of the battery cell groups 201 applies force to the battery cell groups 201, preventing excessive expansion of the battery cells 2011 along the extending direction of the battery cell groups 201 during charging, thereby extending the service life of the battery cells 2011. The cooling medium is injected into each of the liquid cooling plates 202 through the liquid inlet pipe 3. The cooling medium flowing through each of the liquid cooling plates 202 simultaneously absorbs the heat released by the two battery cell groups 201 connected to both sides of the liquid cooling plate 202. After heat exchange, the heated cooling medium is discharged through the liquid outlet pipe 4.

[0034] With the battery module of the present invention, the liquid cooling plate 202 is vertically clamped between the two battery cell groups 201, and stably clamped in the fixing groove 501 between the two adjacent anti-expansion plates 5. It does not need to be laid on the bottom of the battery, and there is no risk of collision and leakage. Moreover, one liquid cooling plate 202 can be used to cool the two battery cell groups 201 on both sides at the same time, reducing the number of liquid cooling plates 202 used, reducing weight, and reducing costs.

[0035] like Figure 1-Figure 3 As shown, the battery cells 2011 are square battery cells, and each of the battery cell groups 201 includes a plurality of battery cells 2011 arranged in parallel in sequence, and the poles of each of the battery cells 2011 are arranged horizontally, and the side with a smaller area of ​​each of the battery cells 2011 is in contact with the bottom wall of the box body 1, that is, each of the battery cells 2011 is arranged upright. Each of the battery cell assemblies 2 includes the liquid cooling plate 202 in the middle and the battery cell groups 201 located on both sides of the liquid cooling plate 202. The poles of the battery cells 2011 in each of the battery cell groups 201 are arranged with their backs to the liquid cooling plate 202. The liquid cooling plate 202 can be made of harmonica tubes, extruded profiles or small stamped cold plates. Figure 3 As shown, in this embodiment, there are three groups of battery cell assemblies 2, and the length of the liquid cooling plate 202 in each of the battery cell assemblies 2 is longer than the extended length of the battery cell group 201. After the liquid cooling plate 202 is connected to the battery cell groups 201 on both sides, the right end of the liquid cooling plate 202 is flush with the battery cell groups 201 on both sides and abuts against the inner wall of the box 1, and the left end protrudes from the battery cell group 201. The anti-expansion plates 5 are respectively provided between two adjacent liquid cooling plates 202 and between the inner wall of the box 1 and the liquid cooling plate 202, so that the battery cells 2011 at the end of the battery cell group 201 located between the inner wall of the box 1 and the adjacent liquid cooling plate 202 abut against one anti-expansion plate 5, and the two battery cells 2011 at the ends of the two opposite battery cell groups 201 in the two battery cell assemblies 2 located between the two adjacent liquid cooling plates 202 abut against the same anti-expansion plate 5. like Figure 1 As shown, the anti-expansion plate 5 arranged close to the inner wall of the box body 1 is respectively connected to the inner wall and the bottom wall of the box body 1, and the anti-expansion plate 5 arranged away from the inner wall of the box body 1 is only connected to the bottom wall of the box body 1. The liquid cooling plate 202 passes through the fixing groove 501 between the corresponding two adjacent anti-expansion plates 5, so that the fixing groove 501 plays a role in stabilizing the clamping and supporting of the liquid cooling plate 202. At the same time, during the charging process of the battery cell 2011, a certain degree of expansion will occur in the extension direction of the battery cell group 201. The anti-expansion plate 5 abuts against the end of the battery cell group 201 to constrain and limit the expansion of the battery cell 2011, thereby preventing the battery cell 2011 from over-expanding. In this embodiment, a total of three battery cell assemblies 2 are arranged in parallel in sequence in the accommodating cavity. The liquid inlet pipe 3 is connected to the liquid inlet of each liquid cooling plate 202, and the liquid outlet pipe 4 is connected to the liquid outlet of each liquid cooling plate 202. They respectively pass through the housing 1 and are connected to external circulation equipment, so that the cooling medium circulates in each liquid cooling plate 202, continuously removing the heat generated by the battery cells 2011. According to actual application conditions, the shape and size of the housing 1, the number of battery cell assemblies 2, and the specific number of battery cells 2011 in each battery cell group 201 can be adjusted. The number of anti-expansion plates 5 can be adjusted, and their specific location in the housing 1 is adjusted to match the length of the battery pack 201 to ensure contact with the end of the battery pack 201. The position of the fixing groove 501 between two adjacent anti-expansion plates 5 is adjusted according to the position change of the liquid cooling plate 202.

[0036] Optionally, the battery module further includes a reinforcing plate 7 connected to the anti-expansion plate 5 and the battery cell 2011. The location where the fixing groove 501 is formed between two adjacent anti-expansion plates 5 is a location where the anti-expansion plates 5 have relatively weak structural strength. The provision of the reinforcing plate 7 and its connection with the anti-expansion plates 5 and the battery cell 2011 can strengthen the structural strength of the anti-expansion plates 5. The combination of the two further enhances the restraint effect on the expansion of the battery cell 2011 during charging.

[0037] In this embodiment, Figure 1 and Figure 3 The battery cell 2011 is provided with the reinforcing plate 7 on both sides facing the inner wall of the bottom side of the box body 1 and facing away from the inner wall of the bottom side of the box body 1. The reinforcing plate 7 is a rectangular thin plate made of steel sheet metal or composite material. The position where the fixing groove 501 is formed between two adjacent anti-expansion plates 5 is the position where its structural strength is weak. Therefore, in this embodiment, Figure 1 and Figure 3 The upper surface of the battery cell 2011 is fixed with the reinforcing plate 7 on the upper surface of each of the two adjacent anti-expansion plates 5 at one end, and the reinforcing plate 7 is fixed to the upper surface of the two battery cell groups 201 at one end of the same battery cell assembly 2. Figure 1 and Figure 3 The lower surface of the battery cell 2011 adopts the same connection method. Figure 1 and Figure 3 The reinforcing plate 7 and the battery core assembly 2 are in a disassembled state and are not connected, so there is a position deviation. According to actual application conditions, the shape, size, number of the reinforcing plate 7, and the specific connection position with the anti-expansion plate 5 and the battery core 2011 can be adjusted.

[0038] Optionally, the width of the reinforcing plate 7 is greater than or equal to twice the thickness of the liquid cooling plate 202. The liquid cooling plate 202 is sandwiched between the two cell groups 201 of the same cell assembly 2. By setting the width of the reinforcing plate 7 to be greater than or equal to twice the thickness of the liquid cooling plate 202, the reinforcing plate 7 can completely span the liquid cooling plate 202 while ensuring sufficient contact and connection area with the cell groups 201 on both sides of the liquid cooling plate 202, thereby ensuring sufficient connection strength.

[0039] Optionally, the reinforcing plate 7 is adhesively connected to the anti-expansion plate 5 and the battery cell 2011, and is also bolted to the anti-expansion plate 5. Adhesive connection is convenient and helps improve operational efficiency. In addition to adhesive connection, bolting the reinforcing plate 7 to the anti-expansion plate 5 provides dual connection security, further stabilizing the connection between the two and improving the ability of the anti-expansion plate 5 to resist the impact force caused by the expansion of the battery cell 2011 during charging.

[0040] Optionally, the surface of the reinforcing plate 7 is covered with an insulating layer. The reinforcing plate 7 is insulated to prevent the risk of leakage and improve overall safety. The insulating layer can be made of any insulating material, such as rubber, plastic or ceramic.

[0041] Optionally, the battery module further includes a reinforcing beam 6 connected to the inner wall of the box 1. The reinforcement beam 6 can improve the structural strength of the box 1, thereby improving the carrying capacity of the box 1 to carry the battery cell assembly 2.

[0042] like Figure 1 As shown, in this embodiment, two parallel reinforcing beams 6 are provided. These reinforcing beams 6 are rectangular plates, shorter than the box body 1. They are perpendicularly connected to the bottom wall of the box body 1 and extend along the extension direction of the battery cell assembly 2. Their right ends are connected to the inner wall of the box body 1, and their left ends are connected to the anti-expansion plate 5. This divides the box body 1 into three parallel, relatively independent spaces, with each battery cell assembly 2 placed in one independent space. The shape, size, number, and specific connection locations of the reinforcing beams 6 with the inner wall of the box body 1 can be adjusted according to actual application.

[0043] Optionally, the liquid cooling plate 202 is adhesively connected to the battery cell 2011. Adhesive connection is convenient to operate and helps improve operating efficiency.

[0044] In this embodiment, the end surface of the battery cell 2011 facing the liquid cooling plate 202 is bonded to the liquid cooling plate 202 through a thermally conductive structural adhesive, so that the liquid cooling plate 202 and the battery cell groups 201 on both sides thereof are firmly bonded to form the battery cell assembly 2, thereby improving the overall structural strength.

[0045] Optionally, the box body 1 includes a lower box body 1011 and a cover plate (not shown). A receiving groove is formed on one side surface of the lower box body 1011. The cover plate covers the receiving groove and is detachably connected to the lower box body 1011. The cover plate and the lower box body 1011 enclose the receiving cavity. This arrangement facilitates disassembly of the box body 1 and facilitates maintenance of the components within the box body 1. The shapes and dimensions of the lower box body 1011 and the cover plate can be adjusted to match as needed.

[0046] The present invention also provides a battery pack comprising at least one battery module according to any of the above embodiments.

[0047] With the battery pack of the present invention, the liquid cooling plate 202 is vertically clamped between the two battery cell groups 201 and does not need to be laid on the bottom of the battery. There is no risk of collision and leakage. Moreover, one liquid cooling plate 202 can be used to cool the two battery cell groups 201 on both sides at the same time, which reduces the number of liquid cooling plates 202 used, reduces weight, and reduces costs.

[0048] The present invention also provides a vehicle, comprising the battery pack described in the above embodiment.

[0049] In the vehicle of the present invention, the liquid cooling plate 202 is vertically clamped between the two battery cell groups 201, and is stably clamped in the fixing groove 501 between the two adjacent anti-expansion plates 5. It does not need to be laid on the bottom of the battery, and there is no risk of collision and leakage. Moreover, one liquid cooling plate 202 can be used to cool the two battery cell groups 201 on both sides at the same time, which reduces the number of liquid cooling plates 202 used, reduces weight, and reduces costs.

[0050] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0051] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principles of the present invention, several other modifications can be made, which should also be considered as the scope of protection of the present invention.

Claims

1. A battery module, characterized in that: include: A box body, wherein a receiving cavity is arranged in the box body; At least one battery cell assembly, at least one of the battery cell assemblies is arranged in the accommodating cavity, each of the battery cell assemblies includes two battery cell groups and a liquid cooling plate connected between the two battery cell groups, each of the battery cell groups includes a plurality of battery cells arranged in sequence along the extension direction of the liquid cooling plate, and the poles of each of the battery cells are facing away from the liquid cooling plate in the same battery cell assembly, and each of the liquid cooling plates is perpendicular to the bottom wall of the box body; A plurality of anti-expansion plates, the plurality of anti-expansion plates are arranged in sequence, and two adjacent anti-expansion plates are spaced apart to form a fixing groove, the anti-expansion plates are fixedly connected to the inner wall of the box body, and abut against the end of the battery cell group in the extension direction, and the liquid cooling plate is clamped in the fixing groove; A liquid inlet pipe, the liquid inlet pipe is connected to the liquid inlet of each of the liquid cooling plates and passes through the box body; A liquid outlet pipe is connected to the liquid outlet of each of the liquid cooling plates and passes through the box body.

2. The battery module according to claim 1, characterized in that: Also includes: A reinforcing plate is connected to the anti-expansion plate and the battery core.

3. The battery module according to claim 2, characterized in that: The width of the reinforcing plate is greater than or equal to twice the thickness of the liquid cooling plate.

4. The battery module according to claim 2 or 3, characterized in that: The reinforcing plate is adhesively connected to the anti-expansion plate and the battery core, and is bolted to the anti-expansion plate.

5. The battery module according to claim 2 or 3, characterized in that: The surface of the reinforcing plate is covered with an insulating layer.

6. The battery module according to any one of claims 1 to 3, characterized in that: Also includes: A reinforcing beam is connected to the inner wall of the box body.

7. The battery module according to any one of claims 1 to 3, characterized in that: The box body comprises: A lower box body, wherein a receiving groove is provided on one side surface of the lower box body; A cover plate covers the accommodating groove and is detachably connected to the lower box body. The cover plate and the lower box body enclose the accommodating cavity.

8. A battery pack, characterized in that: Comprising at least one battery module according to any one of claims 1 to 7.

9. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 8.

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