Module upper cover and battery module

Abstract

The utility model relates to the technical field of batteries, and discloses a module upper cover and a battery module, the module upper cover is suitable for covering a battery cell assembly, the module upper cover comprises a circuit integration assembly and two cover plates, the cover plates and the circuit integration assembly are of an integrally formed structure, the two cover plates are rotatably arranged on the two sides of the circuit integration assembly respectively, and the circuit integration assembly and the two cover plates are integrally formed. Therefore, the two cover plates are switched between the first position and the second position, and the two cover plates abut against each other in the state of being at the first position. The two cover plates are separated in the state of the second position; according to the battery pack disclosed by the utility model, the risk of heat spreading when the battery cells are triggered to be in thermal runaway can be reduced, the safety coefficient of the battery pack is improved, and more sufficient processing time is provided for fire accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an upper cover of a module and a battery module. Background Art

[0002] As the most core power supply component of electric vehicles, power batteries determine key indicators such as the cruising range, cost, service life, and safety of the whole vehicle. With the continuous increase in the power and fast charging power of battery modules, more tests are brought to the safety of power batteries. When the battery module is abused to a certain extent, a series of chain reactions will be triggered to generate a large amount of heat, and at the same time, a large amount of gas is generated to continuously increase the internal pressure of the battery. The pressure relief valve opens, and the sprayed electrolyte will spread to the entire battery module, increasing the risk of thermal runaway, and even causing more serious combustion and explosion accidents.

[0003] The battery module in the related art includes devices such as an upper cover, an ICB assembly, a cell assembly, and side plates. When assembling the battery module, since the upper cover and the ICB assembly are of a split structure, after connecting the ICB assembly and the cell assembly, the upper cover needs to be installed for encapsulation, resulting in cumbersome production processes and seriously affecting production efficiency. At the same time, since the upper cover is of a fully enclosed structure, it will also affect the heat dissipation effect of the battery module and increase the risk of thermal runaway when the cell touches heat. Content of the Utility Model

[0004] In view of this, the utility model provides an upper cover of a module and a battery module to solve the problem of reducing the thermal runaway between the cells of the battery module.

[0005] In a first aspect, the utility model provides an upper cover of a module, which is suitable for covering a cell assembly. The upper cover of the module includes: a circuit integration component and a cover plate.

[0006] There are two cover plates, and the cover plates and the circuit integration component are of an integrally formed structure. The two cover plates are respectively rotatably arranged on both sides of the circuit integration component so that the two cover plates can be switched between a first position and a second position. When the two cover plates are in the first position, the two cover plates are in contact with each other; when the two cover plates are in the second position, the two cover plates are separated.

[0007] A plurality of holes are formed in the cover plate, and heat conduction parts are arranged in the holes.

[0008] Beneficial effects: Integrating the cover plate and the circuit integration component into one piece can reduce the production process and improve production efficiency. Multiple holes filled with heat-conducting parts can reduce the risk of heat spread when the battery cell touches thermal runaway, improve the safety factor of the battery pack, and provide more sufficient time for handling fire accidents. Both cover plates are rotatably connected to the circuit integration component, forming a structure similar to double doors. When in the second position, the two cover plates are in an open state, facilitating the connection of the circuit integration component and the battery cell component. After the connection is completed, rotate the two cover plates to the first position to ensure that the two cover plates are in a closed state, which can achieve a packaging effect. The entire packaging process shortens the working hours compared to the packaging method of completely separating and reassembling the cover plate and the circuit integration component, improving work efficiency.

[0009] In an alternative embodiment, the heat-conducting part is arranged as a heat-conducting rubber block, and the heat-conducting rubber block is suitable for plugging the holes.

[0010] Beneficial effects: The heat-conducting rubber block can seal the holes and, due to its own heat-conducting property, can also play a heat dissipation effect.

[0011] In an alternative embodiment, in the state where the two cover plates are in the first position, the sum of the projected areas of the two cover plates on the surface of the circuit integration component is greater than the surface area of the circuit integration component, so that the circuit integration component is located within the coverage of the two cover plates.

[0012] Beneficial effects: When the two cover plates are in the first position, the two cover plates abut against each other and form a whole plate. The cross-sectional area of the whole plate formed by the two cover plates is larger than the cross-sectional area of the circuit integration component, which can completely cover the circuit integration component, and then play a sealing effect on the circuit integration component during the subsequent packaging process.

[0013] In an alternative embodiment, one of the cover plates is provided with a buckle, and the other cover plate is provided with a slot; in the state where the two cover plates are in the first position, the buckle is engaged with the slot; in the state where the two cover plates are in the second position, the buckle is separated from the slot.

[0014] Beneficial effects: By providing the buckle and the slot, the two cover plates can be connected. When the two cover plates are rotated to abut against each other, the buckle and the slot can be automatically engaged, improving the installation efficiency and enabling the two cover plates to automatically form a whole, playing a packaging and protection role for the battery module.

[0015] In an alternative embodiment, a plurality of the buckles and the slots are respectively provided, and the buckles and the slots are respectively located on two opposite side surfaces of the two cover plates when they abut against each other.

[0016] Beneficial effects: By providing a plurality of card slots and buckles that correspond to each other one by one, the connection strength between the two cover plates can be improved.

[0017] In an alternative embodiment, a structural adhesive is provided between the two cover plates.

[0018] Beneficial effects: The structural adhesive seals the connection part of the two cover plates and can also improve the connection strength.

[0019] In an alternative embodiment, a rotating shaft is provided at the connection position between the cover plate and the circuit integration component, and the cover plate can rotate circumferentially along the rotating shaft.

[0020] Beneficial effects: The cover plate is integrated with the circuit integration component through the rotating shaft, and the cover plate rotates through the rotating shaft.

[0021] In an alternative embodiment, the cross-section of the hole is set as a polygonal structure or a circular structure.

[0022] Beneficial effects: The hole can be filled with a heat-conducting adhesive to enhance the heat dissipation effect.

[0023] In a second aspect, the present invention further provides a battery module, including a battery cell assembly.

[0024] The battery cell assembly includes a plurality of battery cells.

[0025] For the module upper cover as described above, the circuit integration component of the module upper cover is welded to the battery cell assembly.

[0026] The derivation process of the beneficial effects of the battery module is generally similar to the derivation process of the beneficial effects brought by the above-mentioned module upper cover, and will not be elaborated here.

[0027] In an alternative embodiment, the circuit integration component is electrically connected to a plurality of the battery cells.

[0028] Beneficial effects: The circuit integration component can realize the series-parallel connection of a plurality of battery cells and simultaneously collect voltage and temperature signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 It is a schematic structural diagram of a module upper cover according to an embodiment of the present invention;

[0031] Figure 2 For Figure 1 Partial enlarged view of A in;

[0032] Figure 3 Structural schematic diagram of the circuit integration component in the embodiment of the present utility model;

[0033] Explanation of reference numerals in the drawings:

[0034] 1. Circuit integration component; 2. Cover plate; 3. Hole; 4. Buckle; 5. Card slot; 6. Structural adhesive; 7. Rotating shaft. Specific implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] Next, in conjunction with Figures 1 to 3 , describe the embodiments of the present utility model.

[0037] According to an embodiment of the present utility model, on the one hand, a module upper cover is provided, which is suitable for covering the battery cell assembly. The module upper cover includes: a circuit integration component 1 and a cover plate 2.

[0038] There are two cover plates 2, and the cover plates 2 and the circuit integration component 1 are integrally formed structures. The two cover plates 2 are respectively rotatably arranged on both sides of the circuit integration component 1 so that the two cover plates 2 can be switched between a first position and a second position. When the two cover plates 2 are in the first position, the two cover plates 2 are in contact with each other; when the two cover plates 2 are in the second position, the two cover plates 2 are separated.

[0039] A plurality of holes 3 are formed in the cover plate 2, and a heat conduction part is arranged in the holes 3.

[0040] In this embodiment, the multiple holes 3 filled with heat-conducting parts can reduce the risk of thermal spread when the battery cell touches thermal runaway, improve the safety factor of the battery pack, and provide more sufficient processing time for the occurrence of a fire accident. Both cover plates 2 are rotatably connected to the circuit integration component 1 and can form a structure similar to a double-door structure. When in the second position, the two cover plates 2 are in an open state, which is convenient for connecting the circuit integration component 1 and the battery cell component. After the connection is completed, rotate the two cover plates 2 to make them in the first position to ensure that the two cover plates 2 are in a closed state, which can play a packaging effect. The entire packaging process shortens the working hours compared with the packaging method in which the cover plate 2 is completely separated from the circuit integration component 1 and then reassembled, improving the work efficiency. The integrated molding of the cover plate 2 and the circuit integration component 1 can reduce the production process and improve the production efficiency.

[0041] In some embodiments, the cover plate 2 and the circuit integration component 1 can be made of high-temperature resistant materials such as mica. The heat insulation effect of the mica material can prevent the high temperature inside the battery module from affecting the external environment, and the setting of the holes 3 can achieve effective heat dissipation inside the battery module, ensuring that the battery module operates within a reasonable working temperature range. During the actual operation process, the temperature and heat dissipation requirements of the battery module are dynamically changing. Therefore, by setting the multiple holes 3 filled with heat-conducting parts to cooperate with the cover plate 2 and the circuit integration component 1 made of high-temperature resistant materials, the balance between heat insulation and heat dissipation of the battery module can be achieved, and the best heat dissipation effect and safety can be achieved through reasonable material selection and structural design.

[0042] In some embodiments, the holes 3 can cover the cover plate 2 to enhance the heat dissipation effect of the cover plate 2.

[0043] In some embodiments, the circuit integration component 1 is set as an ICB assembly. The ICB assembly includes structures such as busbars, CCS busbars, isolation plates, and low-voltage connectors. There is a detection circuit for the voltage and temperature of the battery cell component inside the CCS busbar, and the collected signals are transmitted to the BMS.

[0044] In some embodiments, the heat-conducting part is set as a heat-conducting rubber block, and the heat-conducting rubber block is suitable for plugging the holes 3.

[0045] In this embodiment, the heat-conducting rubber block can play a role in sealing the holes 3, and at the same time, due to its own heat-conducting property, it can also play a heat dissipation effect.

[0046] In some embodiments, the heat-conducting part can also be set as a silica gel block. Inserting the silica gel block into the holes 3 can not only play the role of plugging the holes 3, but also play the role of heat conduction and heat dissipation.

[0047] In some embodiments, when the two cover plates 2 are in the first position, the sum of the projected areas of the two cover plates 2 on the surface of the circuit integration component 1 is greater than the surface area of the circuit integration component 1, so that the circuit integration component 1 is located within the coverage range of the two cover plates 2.

[0048] In this embodiment, when the two cover plates 2 are in the first position, the two cover plates 2 abut against each other to form a whole plate, and the cross-sectional area of the whole plate formed by the two cover plates 2 is greater than the cross-sectional area of the circuit integration component 1, which can completely cover the circuit integration component 1, and then play a role in sealing the circuit integration component 1 during the subsequent packaging process.

[0049] In some embodiments, one cover plate 2 is provided with a buckle 4, and the other cover plate 2 is provided with a slot 5; the buckle 4 is engaged with the slot 5 when the two cover plates 2 are in the first position; the buckle 4 is separated from the slot 5 when the two cover plates 2 are in the second position.

[0050] In this embodiment, by providing the buckle 4 and the slot 5, the two cover plates 2 can be connected. When the two cover plates 2 are rotated to abut against each other, the buckle 4 and the slot 5 can be automatically snapped together, which can improve the installation efficiency and at the same time make the two cover plates 2 automatically form a whole, playing a role in packaging and protecting the battery module.

[0051] In some embodiments, the provided buckle 4 can extend into or out of the side of the cover plate 2 through an elastic member, so as to realize the engagement with the slot 5.

[0052] In some embodiments, the end of the provided buckle 4 extending out of the side of the cover plate 2 is set as an arc surface or an inclined surface, so that when the two cover plates 2 are closed, the buckle 4 can retract into the cover plate 2, and then extend out of the cover plate 2 when the two cover plates 2 abut against each other and insert into the slot 5, so as to realize the connection of the two cover plates 2.

[0053] In some embodiments, a plurality of buckles 4 and slots 5 are respectively provided, and the buckles 4 and slots 5 are respectively located on the two side surfaces where the two cover plates 2 abut against each other.

[0054] In this embodiment, by providing a plurality of slots 5 and buckles 4 that correspond to each other one by one, the connection strength between the two cover plates 2 can be improved.

[0055] In some embodiments, the provided buckles 4 and slots 5 are respectively arranged at intervals along a straight line on the abutting surfaces of the two cover plates 2, and a plurality of buckles 4 and slots 5 are respectively arranged in one-to-one correspondence.

[0056] In some embodiments, a structural adhesive 6 is provided between the two cover plates 2.

[0057] In this embodiment, the structural adhesive 6 plays a role in sealing the connection part of the two cover plates 2 and can also play a role in improving the connection strength.

[0058] In some embodiments, the structural adhesive 6 is disposed between the abutting surfaces of the two cover plates 2 to assist the buckle 4 and the slot 5 structures to achieve the connection and sealing of the two cover plates 2.

[0059] In some embodiments, a rotating shaft 7 is provided at the connection position between the cover plate 2 and the circuit integration component 1, and the cover plate 2 can rotate circumferentially along the rotating shaft 7.

[0060] In this embodiment, the cover plate 2 is integrated with the circuit integration component 1 through the rotating shaft 7, and the cover plate 2 rotates through the rotating shaft 7.

[0061] In some embodiments, the connection part between the cover plate 2 and the circuit integration component 1 can also be set as a hinge to realize the flipping action of the cover plate 2.

[0062] In some embodiments, the cross-section of the hole 3 is set as a circular structure.

[0063] In this embodiment, the hole 3 can be filled with heat-conducting glue to enhance the heat dissipation effect.

[0064] In some embodiments, the cross-section of the hole 3 is set as a polygonal structure. Setting it as a polygonal structure can cause the bonding interface between the heat-conducting glue and the inner wall of the polygonal hole 3 to have multiple bends, enhancing the bonding strength between the heat-conducting glue and the inner wall of the polygonal hole 3.

[0065] According to an embodiment of the present invention, on the other hand, a battery module is also provided, including a battery cell assembly.

[0066] The battery cell assembly includes a plurality of battery cells.

[0067] As described above for the module upper cover, the circuit integration component 1 of the module upper cover is welded to the battery cell assembly.

[0068] The derivation process of the beneficial effects of the battery module is generally similar to the derivation process of the beneficial effects brought by the above-mentioned module upper cover, and will not be elaborated here.

[0069] In some embodiments, the circuit integration component 1 is electrically connected to a plurality of battery cells.

[0070] In this embodiment, the circuit integration component 1 can realize the series-parallel connection of a plurality of battery cells and simultaneously realize the acquisition of voltage and temperature signals.

[0071] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A module upper cover, characterized in that, Suitable for covering the battery cell assembly, the upper cover of the module includes: A circuit integration component (1); Cover plates (2), there are two cover plates (2), and the cover plates (2) and the circuit integration component (1) are of an integrally formed structure. The two cover plates (2) are respectively rotatably arranged on both sides of the circuit integration component (1) so that the two cover plates (2) can be switched between a first position and a second position. The two cover plates (2) are in contact with each other in the state of the first position; the two cover plates (2) are separated in the state of the second position; A plurality of holes (3) are formed in the cover plate (2), and a heat conduction part is arranged in the holes (3).

2. The upper cover of the module according to claim 1, characterized in that, The heat conduction part is arranged as a heat conduction glue block, and the heat conduction glue block is suitable for plugging the holes (3).

3. The upper cover of the module according to claim 1, characterized in that, In the state where the two cover plates (2) are in the first position, the sum of the projected areas of the two cover plates (2) on the surface of the circuit integration component (1) is greater than the surface area of the circuit integration component (1) so that the circuit integration component (1) is located within the coverage range of the two cover plates (2).

4. The upper cover of the module according to claim 1, characterized in that One of the cover plates (2) is provided with a buckle (4), and the other cover plate (2) is provided with a slot (5); the buckle (4) and the slot (5) are buckled when the two cover plates (2) are in the first position; the buckle (4) and the slot (5) are separated when the two cover plates (2) are in the second position.

5. The upper cover of the module according to claim 4, characterized in that, A plurality of the buckles (4) and the slots (5) are respectively provided, and the buckles (4) and the slots (5) are respectively located on the two side surfaces where the two cover plates (2) are in contact with each other.

6. The upper cover of the module according to claim 1, characterized in that, A structural adhesive (6) is arranged between the two cover plates (2).

7. The upper cover of the module according to claim 1, characterized in that A rotating shaft (7) is arranged at the connection position between the cover plate (2) and the circuit integration component (1), and the cover plate (2) can rotate along the circumference of the rotating shaft (7).

8. The upper cover of the module according to claim 1, characterized in that, The cross section of the hole (3) is arranged as a polygonal structure or a circular structure.

9. A battery module, characterized in that, Including: A battery cell assembly, including a plurality of battery cells; The upper cover of the module according to any one of claims 1 to 8, and the circuit integration component (1) of the upper cover of the module is welded to the battery cell assembly.

10. The battery module according to claim 9, wherein, The circuit integration component (1) is electrically connected to the plurality of battery cells.

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