Module assembly and battery pack with same

Abstract

The utility model discloses a module assembly and a battery pack with the module assembly, the module assembly comprises a battery module, the battery module is provided with a plurality of module units which are arranged in parallel along a first direction, each module unit comprises a plurality of single batteries which are arranged in a laminated manner along a second direction, and the first direction is intersected with the second direction; the reinforcing plates are arranged between the adjacent module units and are connected with the module units in an adhesive manner; and in the first direction, the first glue blocking piece is configured to block a gap between adjacent single batteries in the module unit. According to the module assembly disclosed by the utility model, the reinforcing plate and the first glue blocking piece are arranged, the reinforcing plate is connected with the module unit of the battery module in a bonding manner, and the first glue blocking piece shields the gap between the adjacent single batteries in the module unit, so that the module assembly is simple in structure, and the structural strength of the module assembly can be well improved; and the colloid is prevented from overflowing into gaps among the battery monomers, so that the battery pack operates more stably and reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a module assembly and a battery pack having the same. Background Art

[0002] With the increasingly severe economic situation and the increasingly fierce competition environment in the vehicle industry, cost reduction and efficiency improvement have become important requirements and demand conditions that cannot be ignored in the process of continuous innovation of vehicles. As a key component in new energy vehicles, the battery pack in vehicles has gradually received less national subsidies, and reducing the cost of the battery pack has become an urgent problem to be solved in the vehicle industry. At present, the battery pack adopts the technical solution of battery cell - battery pack, which can well increase the energy density of the battery pack and reduce the cost of the battery pack, and thus has gradually become the mainstream solution.

[0003] Since the battery pack adopting the battery cell - battery pack technical solution reduces the use of side plates and the longitudinal beam of the whole pack, the structural strength of the module in the battery pack decreases. In the related art, a strengthening structure is arranged in the module structure so that the film module structure can have good structural strength. However, when the strengthening structure is adhesively fixed to the module structure, the colloid is easy to overflow into the gap between the battery cells, which makes the battery cells in the battery pack prone to risks of cyclic failure and vibration failure, thus resulting in poor stability and reliability during the operation of the battery pack. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the utility model provides a module assembly, which can well avoid the colloid from overflowing into the gap between the battery cells, greatly reduce the risks of cyclic failure and vibration failure of the battery cells, and make the battery pack operate more stably and reliably.

[0005] The utility model also provides a battery pack having the above module assembly.

[0006] The module assembly according to the first aspect of the utility model includes: a battery module, the battery module having a plurality of module units arranged side by side in a first direction, the module unit including a plurality of battery cells stacked in a second direction, the first direction intersecting the second direction; a reinforcing plate, the reinforcing plate being disposed between adjacent module units and adhesively connected to the module units; a first glue-blocking member, in the first direction, the first glue-blocking member being configured to block the gap between adjacent battery cells in the module unit.

[0007] According to the module assembly of the utility model, by providing a reinforcing plate and a first rubber stopper, the reinforcing plate is adhesively connected to the module unit of the battery module, and the first rubber stopper blocks the gap between adjacent battery cells in the module unit. The structure is simple, and the structural strength of the module assembly can be well improved to prevent the colloid from overflowing into the gap between the battery cells, thereby making the battery pack operate more stably and reliably.

[0008] In some embodiments of the present invention, the first rubber stopper extends along a third direction and is disposed between the reinforcing plate and the module unit. In the first direction, the first rubber stopper abuts against one side surface of two adjacent battery cells facing the reinforcing plate, and the third direction intersects the first direction and the second direction in pairs.

[0009] In some embodiments of the present invention, the first rubber stopper is a foam member.

[0010] In some embodiments of the present invention, a second rubber blocking member is further included. The second rubber blocking member is disposed between the reinforcing plate and the module unit and extends along the second direction. The second rubber blocking member is configured to block the gap between the reinforcing plate and the module unit.

[0011] In some embodiments of the present invention, an insulating member is further included. The insulating member is arranged on one side of the battery module having the pole and the explosion-proof valve, and the insulating member blocks the gap between adjacent module units.

[0012] In some embodiments of the utility model, an end plate is further included. The number of the end plates is two. The two end plates are respectively arranged at the two ends of the battery module in the second direction, and the two ends of the reinforcing plate in the second direction are respectively connected to the two end plates.

[0013] In one embodiment of the utility model, the reinforcing plate includes: a base plate, which extends along the second direction; a fixing plate, wherein the number of the fixing plates is two, the two fixing plates are respectively connected to the two ends of the base plate in the second direction, and the fixing plates are fixedly connected to the end plates.

[0014] In some embodiments of the present invention, the reinforcing plate is a metal piece, and an insulating layer is provided on the outer surface of the reinforcing plate.

[0015] In some embodiments of the utility model, it also includes: a thermal insulation assembly, which is arranged on one side of the battery module in the third direction, and the thermal insulation assembly is bonded and fixed to the battery module; a bus assembly, which is arranged on the other side of the battery module in the third direction, and the bus assembly is electrically connected to the battery module; and an insulating assembly, which is arranged on the side of the bus assembly away from the battery module.

[0016] The battery pack according to the second aspect of the present utility model includes: a housing and a module assembly according to the first aspect of the present utility model. The housing has a receiving cavity, and the module assembly is installed in the receiving cavity.

[0017] For the battery pack of the present utility model, by providing the module assembly of the above first aspect, and by providing a reinforcing plate and a first glue-blocking member, the reinforcing plate is adhesively connected to the module unit of the battery module, and the first glue-blocking member blocks the gap between adjacent battery cells in the module unit. The structure is simple, and the structural strength of the module assembly can be well improved, and the overflow of the colloid into the gap between the battery cells can be avoided, so that the battery pack operates more stably and reliably.

[0018] The additional aspects and advantages of the present utility model will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0019] Figure 1 is a schematic diagram of a module assembly according to an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 a schematic diagram of the module assembly shown in after removing the insulation assembly and the busbar assembly;

[0021] Figure 3 is an exploded view of a module assembly according to an embodiment of the present utility model;

[0022] Figure 4 is a schematic diagram of the assembly of a reinforcing plate, a first glue-blocking member and a second glue-blocking member according to an embodiment of the present utility model;

[0023] Figure 5 is a schematic diagram of a reinforcing plate according to an embodiment of the present utility model;

[0024] Figure 6 is a schematic diagram of an end plate according to an embodiment of the present utility model.

[0025] Reference Signs:

[0026] 10. Battery module; 11. Module unit; 111. Battery cell;

[0027] 20. Reinforcing plate; 21. Substrate; 211. Reinforcing flange; 22. Fixed plate;

[0028] 30. End plate; 301. Mounting hole; 302. Base mounting hole; 303. First fixing hole; 304. Second fixing hole;

[0029] 40. First rubber stop member; 50. Second rubber stop member; 60. Insulating member; 70. Thermal insulation assembly; 80. Busbar assembly; 90. Insulation assembly;

[0030] 100. Module assembly. Specific embodiments

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0032] Reference will be made below Figures 1-6 to describe the module assembly 100 according to the embodiment of the first aspect of the present invention.

[0033] As Figures 1-6 shown, the module assembly 100 according to the embodiment of the first aspect of the present invention includes: a battery module 10, a reinforcing plate 20, and a first rubber stop member 40. The battery module 10 has a plurality of module units 11 arranged side by side in a first direction (such as Figure 2 the left - right direction shown), and each module unit 11 includes a plurality of battery cells 111 stacked in a second direction (such as Figure 2 the front - back direction shown). The first direction intersects the second direction. The reinforcing plate 20 is disposed between adjacent module units 11 and is adhesively connected to the module units 11. In the first direction, the first rubber stop member 40 is configured to block the gap between adjacent battery cells 111 in the module unit 11.

[0034] In this embodiment, the battery module 10 is provided with a plurality of module units 11. The plurality of module units 11 are arranged side by side in the first direction, and each module unit 11 is provided with a plurality of battery cells 111. The battery cells 111 are stacked in the second direction. The structure is simple, the layout is compact and reasonable, and it can well meet the assembly requirements of the battery module 10 in the battery pack.

[0035] In this embodiment, the first direction intersects the second direction, aiming to show that the first direction can be arranged at an acute angle, an obtuse angle or a right angle with the second direction. In this embodiment, the second direction can be the same as the thickness direction of the battery cell 111.

[0036] In this embodiment, a reinforcing plate 20 is provided between adjacent module units 11, and the reinforcing plate 20 is adhesively connected to the module units 11. The reinforcing plate 20 can play a good role in structural reinforcement, enabling the plurality of module units 11 to form a compact and consistent whole, so that the battery module 10 has better structural strength, enabling the battery module 10 to be stably and reliably installed and arranged in the battery pack, and thus making the battery pack operate more stably and reliably.

[0037] In this embodiment, the reinforcing plate 20 is adhesively connected to the module unit 11. When assembling the reinforcing plate 20 and the module unit 11, a colloid can be coated on the surface of the reinforcing plate 20 facing the module unit 11. The surface of the plurality of battery cells 111 in the module unit 11 facing the reinforcing plate 20 is adhesively connected to the reinforcing plate 20 through the colloid. It can be understood that when the reinforcing plate 20 is adhesively connected to the module unit 11, a certain pressing force is required, so that the reinforcing plate 20 can be stably and firmly fixedly connected to the module unit 11 through the colloid, and a compact assembly relationship is formed between the reinforcing plate 20 and the module unit 11.

[0038] During the process of pressing the reinforcing plate 20 and the module unit 11 against each other, the colloid will overflow into the gaps between adjacent battery cells 111 in the module unit 11 under the action of pressure, resulting in different sizes of the gaps between adjacent battery cells 111. As a result, the arrangement of the plurality of battery cells 111 in the module unit 11 is displaced in the second direction, reducing the arrangement compactness and consistency of the plurality of battery cells 111, decreasing the force uniformity between adjacent battery cells 111, making the battery cells 111 more likely to be displaced or damaged under external vibration, increasing the probability of vibration failure of the battery cells 111, thereby reducing the overall structural strength of the module unit 11, and further reducing the overall structural strength and stability of the battery module 10.

[0039] After the colloid is cured, the colloid overflowing between the battery cells 111 increases the mechanical stress between the battery cells 111, making it possible for the battery cells 111 to have structural deformation and damage during cyclic expansion and contraction, thereby increasing the probability of cyclic failure of the battery cells 111, and further reducing the operation stability and reliability of the battery module 10.

[0040] In this embodiment, the first glue-blocking member 40 is provided. The first glue-blocking member 40 is configured to block the gaps between adjacent battery cells 111 in the module unit 11. Thus, during the process of adhesively fixing the reinforcing plate 20 and the module unit 11, the overflow of the colloid into the gaps between the battery cells 111 is well avoided. Furthermore, the battery cells 111 can maintain good cyclic performance and vibration performance, and the plurality of battery cells 111 in the module unit 11 can maintain a compact and consistent arrangement structure, so that the battery module 10 operates more stably and reliably.

[0041] In this embodiment, by providing the first glue-blocking member 40, the role of structural strengthening can be played to a certain extent, making the overall structural strength of the module assembly 100 better, so that the module assembly 100 operates more stably and reliably, and the battery pack can operate more stably and reliably.

[0042] According to the module assembly 100 of the embodiment of the present utility model, by providing a reinforcing plate 20 and a first glue-blocking member 40, the reinforcing plate 20 is adhesively connected to the module unit 11 of the battery module 10, and the first glue-blocking member 40 blocks the gap between adjacent battery cells 111 in the module unit 11. The structure is simple, and the structural strength of the module assembly 100 can be well improved, avoiding the overflow of the colloid into the gap between the battery cells 111, so that the battery pack operates more stably and reliably.

[0043] In some embodiments of the present utility model, as Figure 3 and Figure 4 shown, the first glue-blocking member 40 can extend along the third direction (such as Figure 3 the up-down direction shown), and is disposed between the reinforcing plate 20 and the module unit 11. In the first direction, the first glue-blocking member 40 abuts against the surfaces of two adjacent battery cells 111 facing the reinforcing plate 20, and the third direction intersects with the first direction and the second direction pairwise.

[0044] In this embodiment, setting the first glue-blocking member 40 to extend along the third direction can conveniently block and seal the gap between adjacent battery cells 111. Specifically, the first glue-blocking member 40 is disposed between the reinforcing plate 20 and the module unit 11, and an opening of the gap can be formed between the surfaces of two adjacent battery cells 111 facing the reinforcing plate 20. The first glue-blocking member 40 abuts against the surfaces of the two battery cells 111, so that the opening of the gap can be well blocked, and the colloid coated between the reinforcing plate 20 and the battery cell 111 can be relatively stably located between the surface of the reinforcing plate 20 facing the module unit 11 and the surface of the battery cell 111 facing the reinforcing plate 20.

[0045] In an embodiment of the present utility model, referring to Figure 4 shown, the width dimension of the first glue-blocking member 40 in the second direction can be greater than or equal to 11.7 mm and less than or equal to 12.3 mm.

[0046] In this embodiment, the width of the first glue-blocking member 40 in the second direction is set to be greater than or equal to 11.7 mm, so that the first glue-blocking member 40 can have a sufficient width to abut against the surface of the battery cell 111, thereby enabling the first glue-blocking member 40 to stably and reliably block the colloid. The width of the first glue-blocking member 40 is limited to be less than or equal to 12.3 mm, which can prevent the size of the first glue-blocking member 40 from being too large and resulting in too small a coating space for the colloid between the reinforcing plate 20 and the battery cell 111, ensuring that there is a sufficient amount of colloid between the reinforcing plate 20 and the battery cell 111, so that the reinforcing plate 20 can be stably and reliably bonded and fixed to the battery cell 111, and enabling the module assembly 100 to form good structural strength. For example, the width dimension of the first glue-blocking member 40 in the second direction can be 11.7 mm, 11.8 mm, 11.9 mm, 11.95 mm, 12 mm, 12.2 mm, 12.3 mm, etc.

[0047] In an embodiment of the present utility model, the first glue-blocking member 40 can be adhesively connected to the reinforcing plate 20.

[0048] This can make the assembly and fixation of the first glue-blocking member 40 relatively convenient and easy. The first glue-blocking member 40 is adhesively bonded to the reinforcing plate 20 and abuts against the surface of the battery cell 111, enabling the first glue-blocking member 40 to play a role in blocking and sealing the colloid in the second direction. Thus, when the reinforcing plate 20 and each battery cell 111 are adhesively fixed through the colloid, the flow of the colloid in the second direction can be restricted, so that the colloid can stably and well adhere and fix the reinforcing plate 20 and the battery cell 111.

[0049] In an embodiment of the present utility model, referring to Figure 3 as shown, the thickness dimension of the first glue-blocking member 40 in the first direction can be greater than or equal to 2.7 mm and less than or equal to 3.3 mm.

[0050] In this embodiment, setting the thickness of the first glue-blocking member 40 to be greater than or equal to 2.7 mm can form a stable gap space between the reinforcing plate 20 and the battery cell 111 when the reinforcing plate 20 and the battery cell 111 are adhesively fixed, so that the colloid can be stably coated and arranged between the reinforcing plate 20 and the battery cell 111, making the adhesive fixation between the reinforcing plate 20 and the battery module 10 more stable and reliable.

[0051] In this embodiment, the thickness of the first glue-blocking member 40 is set to be less than or equal to 3.3 mm, so that after the reinforcing plate 20 and the module unit 11 are adhesively fixed, they can maintain a compact assembly relationship in the first direction, thereby enabling the overall structure of the module assembly 100 to maintain good structural strength and enabling the battery pack to maintain good energy density. For example, the thickness dimension of the first glue-blocking member 40 in the first direction can be 2.7 mm, 2.8 mm, 2.85 mm, 2.9 mm, 3.1 mm, 3.3 mm, etc.

[0052] In some embodiments of the present utility model, the first glue-blocking member 40 can be a foam member.

[0053] In this embodiment, the first glue-blocking member 40 is set as a foam member. The foam has certain compressibility, good elasticity and insulation properties. When the reinforcing plate 20 and the battery cell 111 are adhesively fixed, the first glue-blocking member 40 can well cooperate with the change in the distance between the reinforcing plate 20 and the battery cell 111 and compress and deform, so as to stably and reliably abut against the surface of the battery cell 111 to block the gap between adjacent battery cells 111. The first glue-blocking member 40 can play a certain role in insulating and separating the reinforcing plate 20 and the battery cell 111, thereby improving the electrical safety of the battery module 10 to a certain extent and making the module assembly 100 operate more stably. The first glue-blocking member 40 is set as a foam member, which is convenient for processing and has a low cost, so that the manufacturing cost of the module assembly 100 is reduced to a certain extent, thereby reducing the production cost of the battery pack.

[0054] Of course, the material of the first glue-blocking member 40 is not limited to the foam member. For example, the first glue-blocking member 40 can be a silicone member, a rubber member, etc., as long as the use requirements of the first glue-blocking member 40 are met.

[0055] In some embodiments of the present utility model, as Figure 3 and Figure 4 shown, the module assembly 100 may further include a second glue-blocking member 50. The second glue-blocking member 50 is disposed between the reinforcing plate 20 and the module unit 11 and extends along the second direction. The second glue-blocking member 50 is configured to block the gap between the reinforcing plate 20 and the module unit 11.

[0056] It can be understood that when the reinforcing plate 20 is adhesively connected to the module unit 11, the colloid is coated in the gap between the reinforcing plate 20 and the module unit 11. Subsequently, the reinforcing plate 20 and the module unit 11 are pressed against each other, and the colloid will overflow from the gap to the end face of the battery cell 111 in the module unit 11. Specifically, the colloid can overflow from the gap along the third direction, resulting in inconsistent colloid amounts in the third direction in the gap. As a result, after the battery cell 111 in the module unit 11 is adhesively fixed to the reinforcing plate 20, there is a problem of inclined offset in the first direction in the third direction, leading to a decrease in the compactness and consistency of the arrangement of the battery cells 111 in the module unit 11.

[0057] Part of the colloid overflows from the gap, reducing the amount of colloid in the gap. As a result, the structural strength is poor after the reinforcing plate 20 is adhesively fixed to the battery cell 111. Moreover, after the colloid cures, the force uniformity of the battery cell 111 is poor. Consequently, the battery cell 111 is more likely to displace and be damaged under the action of vibration or impact, increasing the probability of vibration failure of the battery cell 111. This leads to a decrease in the overall structural strength of the module unit 11, and further reduces the overall structural strength and stability of the battery module 10.

[0058] In this embodiment, by providing the second glue-blocking member 50 to block the gap between the reinforcing bar and the module unit 11, it is possible to effectively prevent the colloid from overflowing from the gap along the third direction. As a result, the reinforcing plate 20 and the battery cell 111 can obtain a more stable and reliable adhesive fixing effect, making the overall structure of the reinforcing plate 20 and the module unit 11 more stable and reliable. The second glue-blocking member 50 can play a role in strengthening the structure to a certain extent, thereby further improving the overall structural strength of the module assembly 100 and making the operation of the battery pack more stable and reliable.

[0059] In an embodiment of the present invention, referring to Figure 4 As shown, the second glue-blocking member 50 can be provided on one side of the first glue-blocking member 40 in the third direction. In the third direction, the distance between the second glue-blocking member 50 and the first glue-blocking member 40 can be less than or equal to 0.5 mm.

[0060] It can be understood that when the first glue-blocking member 40 and the second glue-blocking member 50 are provided between the reinforcing plate 20 and the module unit 11, the first glue-blocking member 40 needs to cooperate with the second glue-blocking member 50 to block the gap between adjacent battery cells 111 in the third direction. When the gap between the first glue-blocking member 40 and the second glue-blocking member 50 is large, the colloid will overflow from the gap into the gap between adjacent battery cells 111, resulting in the failure of the first glue-blocking member 40 to block the glue.

[0061] In this embodiment, the distance between the second rubber baffle 50 and the first rubber baffle 40 is set to be less than or equal to 0.5 mm, so that the distance between the second rubber baffle 50 and the first rubber baffle 40 is within a reasonable range, so that the first rubber baffle 40 and the second rubber baffle 50 cooperate to play a stable and reliable rubber baffle role, and it is more convenient to assemble and arrange the first rubber baffle 40 and the second rubber baffle 50. For example, the distance between the second rubber baffle 50 and the first rubber baffle 40 can be 0.5 mm, 0.4 mm, 0.2 mm, 0 mm, etc.

[0062] In an embodiment of the present utility model, with reference to Figure 4 As shown, the width dimension of the second rubber baffle 50 in the third direction can be greater than or equal to 7.7 mm and less than or equal to 8.3 mm.

[0063] This can make the second rubber baffle 50 have sufficient width in the third direction, so that the second rubber baffle 50 can stably and reliably block the colloid, and the space occupied by the second rubber baffle 50 between the reinforcing plate 20 and the module unit 11 is small, so that there is sufficient coating space for the colloid, so that the reinforcing plate 20 and the module unit 11 can be stably and reliably bonded and fixed. For example, the width dimension of the second rubber baffle 50 in the third direction can be 7.7 mm, 7.8 mm, 8 mm, 8.01 mm, 8.1 mm, 8.3 mm, etc.

[0064] In an embodiment of the present utility model, the second rubber baffle 50 is adhesively connected to the reinforcing plate 20 and abuts against the battery cell 111.

[0065] This can make the assembly and fixation of the second rubber baffle 50 more convenient and easy. The second rubber baffle 50 is adhesively connected to the reinforcing plate 20 and abuts against the surface of the battery cell 111, so that the first rubber baffle 40 can play a role in separating and sealing the colloid in the third direction. Thus, when the reinforcing plate 20 and each battery cell 111 are adhesively fixed through the colloid, the flow of the colloid in the third direction can be restricted, so that the colloid can stably and well adhere and fix the reinforcing plate 20 and the battery cell 111.

[0066] In some embodiments of the present utility model, as shown in Figure 2 and Figure 3 As shown, the module assembly 100 may further include an insulating member 60. The insulating member 60 is disposed on one side of the battery module 10 having a pole post and an explosion-proof valve, and the insulating member 60 seals the gap between adjacent module units 11.

[0067] It can be understood that when thermal runaway occurs in the battery cell 111, the ejecta sprays out from the explosion-proof valve, and the ejecta flows into the gap between adjacent module units 11 and accumulates in the gap. It is easy for the ejecta to connect the pole column and the reinforcing plate 20, causing an external short circuit in the battery cell 111, resulting in an arcing phenomenon in the battery cell 111, and exacerbating the thermal runaway of the battery cell 111. Arcing is an arc discharge phenomenon. When there is air or other non-conductive substances between the positive and negative pole columns of the battery cell 111, when the voltage between the two poles is high enough, the air or other non-conductive substances will be broken down to form a conductive channel, generating an arc. The arc discharge will be accompanied by an extremely high temperature, melting the metal in the battery cell 111, thereby exacerbating the thermal runaway of the battery cell 111.

[0068] In this embodiment, the insulating member 60 is provided to block the gap between adjacent module units 11, which can well prevent the ejecta from flowing into the gap and avoid the insulating member 60 and the pole column from forming an external short circuit through the ejecta, thereby well reducing the arcing phenomenon when the battery cell 111 is in thermal runaway, and further reducing the probability of thermal runaway of the entire battery pack, making the battery pack have better electrical safety.

[0069] In an embodiment of the present invention, the insulating member 60 can be a high-temperature resistant member. In this way, the insulating member 60 can well withstand the heat of the ejecta, thereby stably and reliably blocking the ejecta from flowing into the gap between the reinforcing plate 20 and the module unit 11, and making the electrical safety of the battery pack better.

[0070] In some embodiments of the present invention, as Figure 2 and Figure 3 shown, the module assembly 100 may further include end plates 30. The number of end plates 30 is two. The two end plates 30 are respectively arranged at both ends of the battery module 10 in the second direction, and both ends of the reinforcing plate 20 in the second direction are respectively connected to the two end plates 30.

[0071] In this embodiment, end plates 30 are arranged at both ends of the battery module 10 and the end plates 30 are connected to the reinforcing plate 20, so that the end plates 30 and the reinforcing plate 20 cooperate to play a good role in fixing and strengthening the structure of the battery module 10. The module units 11 are adhesively fixed to the reinforcing plate 20 on both sides in the first direction, and the module units 11 are fastened through the cooperation of the reinforcing plate 20 and the end plates 30 on both sides in the second direction, so that the battery module 10 has better structural strength and the module assembly 100 can operate more stably and reliably.

[0072] In an embodiment of the present invention, as Figure 3 and Figure 5As shown, the reinforcing plate 20 may include: a base plate 21 and fixing plates 22. The base plate 21 extends in the second direction. The number of the fixing plates 22 is two, and the two fixing plates 22 are respectively connected to both ends of the base plate 21 in the second direction. The fixing plates 22 are fixedly connected to the end plate 30.

[0073] In this embodiment, the reinforcing plate 20 is provided with the base plate 21 and the fixing plates 22, and the fixing plates 22 are fixedly connected to the end plate 30. The structure is simple, which is convenient for the assembly and fixation of the reinforcing plate 20 and the end plate 30. The base plate 21 extends in the second direction, which can well meet the requirements of bonding and fixing between the reinforcing plate 20 and the module unit 11.

[0074] In some examples of the present utility model, as Figure 5 shown, the fixing plates 22 extend in the first direction. The fixing plates 22 are provided with a plurality of mating holes, and the end plate 30 may be provided with a plurality of mounting holes 301. The plurality of mating holes and the plurality of mounting holes 301 are arranged in one-to-one correspondence. The fixing plates 22 and the end plate 30 are fixedly connected by fasteners passing through the mating holes and the mounting holes 301.

[0075] In this embodiment, extending the fixing plates 22 in the first direction can facilitate the connection and fixation of the fixing plates 22 and the end plate 30, and an included angle can be formed between the fixing plates 22 and the base plate 21, making the overall structural strength of the reinforcing plate 20 higher, so that the connection and fixation between the reinforcing plate 20 and the end plate 30 are more stable and reliable. The cooperation between the reinforcing plate 20 and the end plate 30 can play a better role in strengthening the structure of the battery module 10, making the module assembly 100 operate more stably and reliably.

[0076] In this embodiment, the fixing plates 22 and the end plate 30 are fixedly connected by fasteners passing through the mating holes and the mounting holes 301. The structure is simple, the fixation is firm, and the disassembly is convenient. The fasteners can improve the connection strength between the reinforcing plate 20 and the end plate 30, so that the connection and fixation between the reinforcing plate 20 and the end plate 30 are more reliable.

[0077] In this embodiment, a plurality of the mating holes and the mounting holes 301 are provided, and the reinforcing plate 20 and the end plate 30 are fixedly connected by a plurality of fasteners, which can make the connection and fixation between the reinforcing plate 20 and the end plate 30 more stable, and the reinforcing plate 20 can be stably bonded and fixed to the module unit 11. For example, the mating holes can be provided with two, three, four, five, six, etc., and the number of the mounting holes 301 can be the same as that of the mating holes and arranged in one-to-one correspondence with the mating holes in the second direction. The number of the mating holes and the mounting holes 301 can be reasonably set according to the connection and fixation requirements between the reinforcing plate 20 and the end plate 30.

[0078] In one example of the present utility model, as Figure 5As shown, at one end of the substrate 21 in the third direction, a reinforcing flange 211 may be formed, and the reinforcing flange 211 extends along the first direction. This can improve the overall structural strength of the substrate 21 in the second direction, reduce the probability of the substrate 21 being bent and deformed, and enable the substrate 21 to be stably and reliably assembled and fixed with the module unit 11.

[0079] In some embodiments of the present invention, the reinforcing plate 20 may be a metal part, and an insulating layer is provided on the outer surface of the reinforcing plate 20.

[0080] In this embodiment, the reinforcing plate 20 is set as a metal part, so that the reinforcing plate 20 can have good structural strength, thereby enabling the reinforcing plate 20 to well improve the overall structural strength of the module assembly 100 and making the module assembly 100 operate more stably and reliably. In this embodiment, an insulating layer is provided on the outer surface of the reinforcing plate 20, which can play a good role in insulating separation for the reinforcing plate 20, so that there can be a good electrical insulation effect between the reinforcing plate 20 and the module unit 11, thereby making the electrical safety of the module assembly 100 better, making the module assembly 100 operate more stably, and enabling the battery pack to operate more stably and reliably.

[0081] In some embodiments of the present invention, as Figure 3 shown, the module assembly 100 may further include: a thermal insulation assembly 70, a busbar assembly 80, and an insulation assembly 90. The thermal insulation assembly 70 is provided on one side of the battery module 10 in the third direction, and the thermal insulation assembly 70 is adhesively fixed to the battery module 10; the busbar assembly 80 is provided on the other side of the battery module 10 in the third direction, and the busbar assembly 80 is electrically connected to the battery module 10; the insulation assembly 90 is provided on the side of the busbar assembly 80 facing away from the battery module 10.

[0082] In this embodiment, the thermal insulation assembly 70 is provided and adhesively fixed to the battery module 10. The structure is simple, and it can play a good role in thermal insulation for the battery module 10, thereby meeting the requirements of the thermal management of the battery pack and enabling the battery pack to operate stably. In this embodiment, the busbar assembly 80 is provided, which can well meet the electrical connection requirements of the battery module 10. The insulation assembly 90 is provided, which can play a good role in insulating protection for the battery module 10, so that the module assembly 100 can operate stably and well.

[0083] In an embodiment of the present invention, as Figure 6 shown, the end plate 30 may be provided with a base mounting hole 302, a first fixing hole 303, and a second fixing hole 304. The base mounting hole 302 is used for the installation and fixation of the output pole protection base, the first fixing hole 303 is used for the installation and fixation of the low-voltage plug-in, and the second fixing hole 304 is used for the fixation of the end plate 30 to the housing of the battery pack.

[0084] In this embodiment, a base mounting hole 302, a first fixing hole 303, and a second fixing hole 304 are provided on the end plate 30. The structure is simple and has good integration, which facilitates the assembly and fixation of the output pole protection base and the low-voltage plug-in. The end plate 30 and the housing can be fixedly connected through a fastener passing through the second fixing hole 304, which facilitates the assembly and fixation of the module assembly 100 in the battery pack.

[0085] Next, reference will be made to Figures 1-6 describe a battery pack according to an embodiment of the second aspect of the present invention.

[0086] As Figures 1-6 shown, the battery pack according to an embodiment of the present invention includes: a housing and a module assembly 100 according to an embodiment of the first aspect of the present invention. The housing has a receiving cavity, and the module assembly 100 is installed in the receiving cavity.

[0087] Other components and operations of the battery pack according to an embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0088] For the battery pack according to an embodiment of the present invention, by providing the module assembly 100 of the above-mentioned first aspect embodiment, by providing the reinforcing plate 20 and the first glue-blocking member 40, the reinforcing plate 20 is adhesively connected to the module unit 11 of the battery module 10, and the first glue-blocking member 40 blocks the gap between adjacent battery cells 111 in the module unit 11. The structure is simple, and the structural strength of the module assembly 100 can be well improved, and the glue is prevented from overflowing into the gap between the battery cells 111, so that the battery pack operates more stably and reliably.

[0089] Next, reference will be made to Figures 1-6 describe a battery pack according to a specific embodiment of the present invention.

[0090] As Figures 1-6 shown, the battery pack includes a housing and a module assembly 100. The housing has a receiving cavity, and the module assembly 100 is disposed in the receiving cavity.

[0091] The module assembly 100 includes a thermal insulation assembly 70, a busbar assembly 80, an insulation assembly 90, an output terminal protection assembly, a low-voltage plug-in, a battery module 10, a reinforcing plate 20, an end plate 30, a first rubber stopper 40, a second rubber stopper 50, and an insulating member 60. The thermal insulation assembly 70 is disposed on the side of the battery module 10 in the third direction without a pole post and an explosion-proof valve, and the battery module 10 is adhesively connected to the thermal insulation assembly 70. The busbar assembly 80 is arranged on the side of the battery module 10 in the third direction with a pole post and an explosion-proof valve. The busbar assembly 80 is electrically connected to the battery module 10. The busbar assembly 80 can be composed of a busbar between battery cells 111, a jumper busbar, a flexible circuit board, a temperature sensor bracket, and a hot-pressing film. The busbar assembly 80 is used for series-parallel conduction, voltage acquisition, and temperature acquisition of the battery cells 111 in the battery module 10.

[0092] There are two end plates 30. The end plates 30 extend along the first direction. The two end plates 30 are respectively arranged at both ends of the battery module 10 in the second direction. The end plates 30 are provided with second fixing holes 304 for fixing to the housing through fasteners. The output terminal protection assembly includes an output terminal protection base. The end plates 30 may be provided with base mounting holes 302 and first fixing holes 303 to facilitate the installation and fixation of the output terminal protection base and the low-voltage plug-in. The battery module 10 includes five module units 11. The five module units 11 are arranged side by side along the first direction. The module units 11 extend along the second direction. The module units 11 include a plurality of battery cells 111 arranged in layers along the second direction.

[0093] There are six reinforcing plates 20. Four reinforcing plates 20 are respectively arranged between adjacent module units 11. Two reinforcing plates 20 are respectively arranged on both sides of the battery module 10 in the first direction. Specifically, the widths of the two reinforcing plates 20 arranged on both sides of the battery module 10 in the third direction can be smaller to cooperate with the assembly of the module assembly 100 in the battery pack.

[0094] The reinforcing plate 20 is a metal plate and has an insulating layer. The reinforcing plate 20 includes a substrate 21 and fixing plates 22. The number of fixing plates 22 is two and they are respectively arranged at both ends of the substrate 21 in the second direction. The fixing plates 22 are welded to the substrate 21 to form an integral part. The thickness direction of the fixing plates 22 is the same as the second direction. The fixing plates 22 are provided with four mating holes. The four mating holes are arranged at intervals on the fixing plates 22. The end plates 30 are provided with four corresponding mounting holes 301. The reinforcing plate 20 and the end plates 30 are fixedly connected by fasteners passing through the mating holes and the mounting holes 301. Of course, the reinforcing plate 20 and the end plates 30 can also be fixedly connected by connection methods such as riveting or welding, as long as the assembly and connection requirements are met. The substrate 21 and the module unit 11 are adhesively fixed by a thermally conductive structural adhesive. Among them, the two reinforcing plates 20 located on both sides of the battery module 10 may not be provided with fixing plates 22 to facilitate the assembly of the module assembly 100 in the battery pack.

[0095] The insulating member 60 is a heat-resistant insulating board. The number of insulating members 60 is four. The four insulating members 60 respectively seal the gaps formed between adjacent module units 11. Specifically, the insulating member 60 can be arranged on the side of the battery module 10 where there are explosion-proof valves and pole columns in the third direction. The insulating member 60 is adhesively connected to the surfaces of two adjacent module units 11 facing the busbar assembly.

[0096] The first glue-blocking member 40 is arranged between the reinforcing plate 20 and the module unit 11 and is adhesively fixed to the substrate 21 of the reinforcing plate 20. The first glue-blocking member 40 abuts against the surfaces of two adjacent battery cells 111 in the module unit 11 to block the gaps between the battery cells 111. In another embodiment, the first glue-blocking member 40 can also be arranged between adjacent battery cells 111, and the first glue-blocking member 40 abuts against the surfaces of two adjacent battery cells 111 to block the gaps between the battery cells 111 in the second direction.

[0097] The number of the second glue-blocking members 50 is eight. The eight second glue-blocking members 50 are respectively arranged between the substrate 21 of the reinforcing plate 20 and the module unit 11. The second glue-blocking members 50 are arranged on the side of the first glue-blocking member 40 facing the insulating member 60 in the third direction. The second glue-blocking members 50 are adhesively fixed to the substrate 21 of the reinforcing plate 20 and abut against the module unit 11. In another embodiment, the second glue-blocking members 50 can also be arranged on both sides of the first glue-blocking member 40 in the third direction, so as to more stably and reliably block the colloid and make it more reliable and convenient when the reinforcing plate 20 is adhesively fixed to the module unit 11.

[0098] For the battery pack according to the embodiment of the present invention, by arranging the reinforcing plate 20 and the first glue-blocking member 40, the reinforcing plate 20 is adhesively connected to the module unit 11 of the battery module 10, and the first glue-blocking member 40 blocks the gaps between adjacent battery cells 111 in the module unit 11. The structure is simple, and the structural strength of the module assembly 100 can be well improved, and the colloid is prevented from overflowing into the gaps between the battery cells 111, so that the battery pack operates more stably and reliably.

[0099] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0100] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0101] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0102] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0103] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A module assembly, characterized in that: include: A battery module, the battery module having a plurality of module units arranged in parallel along a first direction, the module unit comprising a plurality of battery cells stacked and arranged along a second direction, the first direction intersecting the second direction; A reinforcing plate, the reinforcing plate is arranged between adjacent module units and is adhesively connected to the module units; A first rubber stopper is configured to block gaps between adjacent battery cells in the module unit in the first direction.

2. The module assembly according to claim 1, characterized in that: The first rubber stopper extends along a third direction and is disposed between the reinforcing plate and the module unit. In the first direction, the first rubber stopper abuts against one side surface of two adjacent battery cells facing the reinforcing plate. The third direction intersects the first direction and the second direction in pairs.

3. The module assembly according to claim 1, characterized in that: The first rubber blocking component is a foam component.

4. The module assembly according to claim 1, characterized in that: It also includes a second rubber blocking member, which is arranged between the reinforcing plate and the module unit and extends along the second direction, and is configured to block the gap between the reinforcing plate and the module unit.

5. The module assembly according to claim 1, characterized in that: It also includes an insulating member, which is arranged on one side of the battery module having the pole and the explosion-proof valve, and the insulating member blocks the gaps between adjacent module units.

6. The module assembly according to claim 1, characterized in that: It also includes two end plates, which are respectively arranged at two ends of the battery module in the second direction, and the two ends of the reinforcing plate in the second direction are respectively connected to the two end plates.

7. The module assembly according to claim 6, characterized in that: The reinforcing plate comprises: a substrate extending along the second direction; A fixing plate, wherein the number of the fixing plates is two, the two fixing plates are respectively connected to two ends of the base plate in the second direction, and the fixing plates are fixedly connected to the end plates.

8. The module assembly according to claim 1, characterized in that: The reinforcing plate is a metal piece, and an insulating layer is provided on the outer surface of the reinforcing plate.

9. The module assembly according to claim 1, characterized in that: Also includes: A heat preservation assembly, the heat preservation assembly is arranged on one side of the battery module in the third direction, and the heat preservation assembly is bonded and fixed to the battery module; A bus assembly, the bus assembly is arranged on the other side of the battery module in the third direction, and the bus assembly is electrically connected to the battery module; An insulation assembly is arranged on a side of the busbar assembly away from the battery module.

10. A battery pack, characterized in that: include: A shell and a module assembly according to any one of claims 1 to 9, wherein the shell has a receiving cavity, and the module assembly is installed in the receiving cavity.

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