Battery housing and battery pack

Abstract

Battery housing, characterized in that it comprises a housing body, a lower protective plate, a bracket and a suction cup, wherein the housing body has a receiving cavity, and wherein a side of the housing body extending along a first direction is provided with an opening which is connected to the receiving cavity, and wherein the lower protective plate is detachably connected to the opening, and wherein the bracket is installed on a cavity wall of the receiving cavity, and wherein the bracket and the lower protective plate are spaced apart from each other to form a pressure relief channel, and wherein the pressure relief channel is used to provide pressure relief to the thermally permeable gas of the battery cell component at the bracket, and wherein the suction cup is arranged on a side of the bracket facing the lower protective plate, and is supported on the lower protective plate.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the technical field of batteries, in particular a battery housing and a battery pack. STATE OF THE ART

[0002] With the rapid development of the new energy vehicle industry, lithium battery modules are widely used in new energy vehicles. The lithium battery module includes a battery case and a battery cell module. The battery cell module is arranged within the battery case. To prevent thermal runaway of a single cell in the lithium battery module from affecting the safety of other single cells around the single cell, a corresponding thermal runaway design is generally configured.

[0003] In related technology, the thermal runaway design of lithium battery module is usually that a pressure relief channel is arranged on the battery case to quickly discharge the thermally runaway gas of a single cell and thus prevent it from affecting the thermal runaway of other single cells. The pressure relief channel is usually formed in such a way that a support plate for supporting the battery cell module and the lower protection plate of the battery case are spaced from each other. Only the edge of the lower protection plate is connected to the frame of the case body, and the center of the lower protection plate is overhanging, which makes the connection strength and impact resistance poor. DISCLOSURE OF THE UTILITY MODEL

[0004] A purpose of the embodiment of the present utility model is to provide a battery case and a battery pack having a simple structure, wherein the lower protective plate has good joining strength and impact resistance.

[0005] To achieve the purpose, an embodiment of the present utility model uses the following technical solution:

[0006] An embodiment of the present utility model provides, in a first aspect, a battery case comprising a case body, a lower protection plate, a holder, and a suction cup, wherein the case body has a receiving cavity, and wherein a side of the case body extending along a first direction is provided with an opening that communicates with the receiving cavity, and wherein the lower protection plate is detachably connected to the opening, and wherein the holder is installed on a cavity wall of the receiving cavity, and wherein the holder and the lower protection plate are spaced apart from each other to form a pressure relief channel, and wherein the pressure relief channel is used to perform pressure relief on the thermally transmitted gas of the battery cell component at the holder,and wherein the suction cup is arranged on a side of the holder facing the lower protective plate and is supported on the lower protective plate.,

[0007] An embodiment of the present utility model provides, in a second aspect, a battery pack comprising a battery cell component and a battery case, wherein the battery cell component is installed on the holder of the battery case, and wherein the battery cell component is located on a side of the holder facing away from the lower protective plate.

[0008] In some embodiments of the present invention, the following advantages are achieved: the detachable connection between the lower protection plate and the case body can effectively improve the production convenience of the battery case, and it is convenient for subsequent replacement of the lower protection plate to reduce the maintenance cost of the battery case; using the suction cup, the bracket is connected to the lower protection plate, which is convenient for disassembly, and it effectively improves the connection strength of the middle portion of the lower protection plate; and supporting the lower protection plate by the suction cup can improve the impact resistance of the lower protection plate to reduce the deformation of the lower protection plate under external impact;When the thermally transmitted gas of the battery cell component enters the pressure relief channel, the increase of the air pressure in the pressure relief channel allows the suction cup to detach from the connection with the lower protection plate. Under the thrust of the air pressure of the thermally transmitted gas, the lower protection plate protrudes outward away from the bracket to increase the volume of the pressure relief channel, thereby improving the safety of use of the battery case. REPRESENTATION OF THE UTILITY MODEL

[0009] The present utility model is explained in more detail below in conjunction with the attached drawings and exemplary embodiments. Fig. 1 shows a schematic diagram of the structure of a battery case in an embodiment of the present utility model. Fig. 2 shows a sectional view of a battery case in an embodiment of the present utility model. Fig. 3 shows a schematic diagram of a partial structure of a battery case in an embodiment of the present utility model. List of reference symbols:

[0010] 1 Housing body; 11 Receiving cavity; 12 Pressure relief channel; 13 Outlet port; 14 Guide slot; 2 Lower protective plate; 3 Bracket; 31 Connection hole; 32 Insertion slot; 33 Support section; 4 Suction cup; 5 Pressure plate CONCRETE EMBODIMENTS

[0011] In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present utility model are explained in more detail below in conjunction with the attached drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present utility model.

[0012] Unless otherwise clearly stated and defined in this utility model, the terms "coupling," "connection," and "attachment" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection via a medium; it can also be a connection within two elements or an interaction relationship between two elements. A person of ordinary skill in the art can understand the specific meanings of the above terms in this utility model based on specific situations.

[0013] In the present utility model, the expression that the first feature is "above" or "below" the second feature can mean both that the first and second features are in direct contact, and can mean that the first and second features are not in direct contact but are contacted by another feature, unless expressly stated and limited otherwise. Furthermore, the expression that the first feature is "above the second feature," "above the second feature," or "on top of the second feature" refers to the first feature being directly above and diagonally above the second feature, or the expression simply means that the horizontal height of the first feature is greater than that of the second feature.The expression that the first feature is "below the second feature", "below the second feature", or "at the bottom of the second feature" refers to the first feature being directly below and diagonally below the second feature, or the expression simply means that the horizontal height of the first feature is less than that of the second feature.

[0014] The utility model provides a battery housing and battery pack with a simple structure. The bottom protective plate has high bond strength and impact resistance.

[0015] As in Fig. 1 and Fig. 2, a battery case in the exemplary embodiment of the present utility model comprises a case body 1, a lower protection plate 2, a holder 3, and a suction cup 4, wherein the case body 1 has a receiving cavity 11, and wherein a side of the case body 1 extending along a first direction is provided with an opening that communicates with the receiving cavity 11, and wherein the lower protection plate 2 is detachably connected to the opening, and wherein the holder 3 is installed on a cavity wall of the receiving cavity 11, and wherein the holder 3 and the lower protection plate 2 are spaced apart from each other to form a pressure relief channel 12, and wherein the pressure relief channel 12 is used to perform pressure relief on the thermally transmitted gas of the battery cell component at the holder 3,and wherein the suction cup 4 is arranged on a side of the holder 3 facing the lower protective plate 2 and is supported on the lower protective plate 2.

[0016] In the normal use state of the battery case, the lower protective plate 2 is located at the bottom and the first direction is the height direction, wherein the production convenience of the battery case can be effectively improved by detachably connecting the lower protective plate 2 to the case body 1, namely, dividing a complex overall component into a plurality of simple parts for manufacturing, which is convenient for later replacement of the lower protective plate 2 when it is damaged by impact to reduce the maintenance cost of the battery case;Using the suction cup 4, the bracket 3 is connected to the lower protective plate 2, which on the one hand enables convenient disassembly, compared with the bolt connection and other detachable connections, the connection is convenient, and the operation intensity is reduced, furthermore, the connection position has good sealing performance to guarantee the closed performance of the pressure relief channel 12 and reduce the circumstances in which water or other contaminants enter the battery case and affect the normal use of the battery cell component;On the other hand, the connection strength of the central region of the lower protective plate 2 can be effectively improved, and the support of the lower protective plate 2 by the suction cup 4 can further improve the impact resistance of the lower protective plate 2, namely, when an external impact is applied to the lower protective plate 2, part of the impact force can be alleviated by the supporting force provided by the suction cup 4 to reduce the deformation of the lower protective plate 2 under external impact;When the thermally transmitted gas of the battery cell component enters the pressure relief channel 12, the increase in air pressure in the pressure relief channel 12 allows the suction cup 4 to detach from the connection with the lower protection plate 2. Under the thrust of the air pressure of the thermally transmitted gas, the lower protection plate 2 protrudes outwardly away from the bracket 3 to increase the volume of the pressure relief channel 12, thereby improving the safety of use of the battery case.

[0017] For example, the bottom of the housing body 1 is provided with a first threaded hole, and a plurality of first through holes are provided on the lower protection plate 2. By screwing a first bolt through the first through hole into the first threaded hole, the lower protection plate 2 is connected to the housing body 1. The screw connection is convenient for disassembly and installation, and the connection is stable. In other embodiments, it is also possible to provide a snap fastener on the lower protection plate 2 and a clamping slot on the housing body 1, and to use the snap fastener and the clamping slot to connect by means of a snap connection, which is not unduly limited here.

[0018] In some embodiments, as in the Fig. 2 and Fig. 3, as shown in Fig. 2 and Fig. 3, the holder 3 is provided throughout with a plurality of connection holes 31, wherein the number of connection holes 31 corresponds one to one to the number of battery cells of the battery cell component, and wherein the connection holes 31 are arranged directly opposite to the explosion-proof valve of the battery cells.

[0019] The communication holes 31 are provided so that the gas generated during thermal runaway of the battery cell can be quickly led into the pressure relief channel 12, and the pressure relief valve of each battery cell is correspondingly provided with a communication hole 31 so that the pressure relief distance is short and the effect of the spread of the high-temperature thermal runaway gas to other battery cells is reduced.

[0020] In some embodiments, as in Fig. 2 and Fig. As shown in Figure 3, a plurality of insertion slots 32 are recessed on a side of the bracket 3 facing away from the lower protective plate 2, and the connection holes 31 are arranged to penetrate the slot bottom of the insertion slots 32, and the insertion slots 32 are used for inserting the battery cells. The arrangement of the insertion slots 32 facilitates the positioning of the battery cell when installed on the bracket 3 and improves the positioning accuracy of the battery cell installation; and the use of the slot wall of the insertion slots 32 to limit the peripheral side of the battery cell can improve the connection strength of the battery cell installation.

[0021] In some embodiments, as in Fig. As shown in Figure 2, on a side of the bracket 3 facing the lower protective plate 2, a plurality of support portions 33 are arranged protrudingly at intervals, with at least one suction cup 4 being arranged on each of the support portions 33. By providing the support portions 33, it is possible to ensure that the suction cup 4 is connected to the lower protective plate 2 when the lower protective plate 2 and the bracket 3 are spaced a certain distance apart, and to strengthen the support of the bracket 3 for the suction cup 4.

[0022] In some embodiments, as in Fig. 1, an exhaust port 13 is provided on the case body 1, which communicates with the pressure relief channel 12. With the arrangement of the exhaust port 13, the thermally transmitted gas generated by the battery cell can be quickly discharged from the case body 1, thereby preventing the thermally transmitted gas from accumulating and exploding in the pressure relief channel 12. In the present embodiment, the exhaust port 13 is provided on the side wall of the case body 1, thereby preventing the exhaust port 13 from facing the ground during daily use, compared to the arrangement of the exhaust port 13 on the lower protective plate 2, and reducing the occurrence of a situation where impurities or water enter the pressure relief channel 12.

[0023] In some embodiments, the battery case further includes an explosion-proof tab used to block the exhaust port 13. The explosion-proof tab can be broken and open the exhaust port 13 when the thermally transmitted gas reaches a certain air pressure, so that the pressure relief channel 12 is connected to the outside. With the arrangement of the explosion-proof tab, the exhaust port 13 can be blocked during daily use to ensure the tightness of the pressure relief channel 12 and prevent contaminants from entering the pressure relief channel 12 and thus affecting the use of the battery cell, thereby improving the use safety of the battery case.

[0024] In some embodiments, the thickness of the central position of the explosion-proof tab is smaller than the thickness of the edge position, the design can ensure the connection strength between the explosion-proof tab and the housing body 1, further, it can be caused that under impact by the thermally transmitted gas, the explosion-proof tab is first broken from the weak zone to ensure the use safety of the explosion-proof tab.

[0025] In some embodiments, the bracket 3 is detachably connected to the cavity wall of the receiving cavity 11. This detachable arrangement facilitates the manufacture of the battery case and reduces production costs, and the bracket 3 and the case body 1 can be individually replaced during later maintenance, thereby reducing maintenance costs. In the present embodiment, the bracket 3 is provided with a second through-hole, and the case body 1 is provided with a second threaded hole. The second bolt is screwed through the second through-hole into the second threaded hole to firmly connect the bracket 3 to the case body 1, providing a robust connection and ensuring the stability of the connection of the bracket 3. In other embodiments, the bracket 3 can also be connected by other detachable means, such as snap connections, which are not explained in detail here.

[0026] In some embodiments, a guide slot 14 is recessed into the cavity wall of the receiving cavity 11, the length of the guide slot 14 extending along the first direction, and a guide portion is arranged on the bracket 3 and inserted into the guide slot 14. Through the cooperation between the guide portion and the guide slot 14, the guidance of the bracket 3 can be reinforced when the bracket is installed, and the installation accuracy of the connection of the bracket 3 can be improved.

[0027] As in Fig.1 to 3, an embodiment of the present invention further provides a battery pack comprising a battery cell component and a battery case in any of the above embodiments, wherein the battery cell component is installed on the bracket 3 of the battery case, and wherein the battery cell component is located on a side of the bracket 3 opposite the lower protection plate 2. In the battery case of the battery pack, the bracket 3 and the lower protection plate 2 are spaced apart from each other to form a pressure relief channel 12, which facilitates the discharge of the thermally transmitted gas of the battery cell and improves the safety of use of the battery pack.

[0028] In some embodiments, the battery pack further comprises a pressure plate 5, wherein an installation opening is provided on a side of the housing body 1 of the battery housing facing away from the lower protective plate 2, which is in communication with the receiving cavity 11 of the housing body 1, and wherein the pressure plate 5 is arranged at the installation opening and is used to press against the battery cell component.It can be understood that the installation order of the battery cell module is as follows: first, the lower protection plate 2 is installed on the case body 1 to block the opening of the case body 1, and then the bracket 3 provided with the battery cell component is installed in the receiving cavity 11, and when the bracket 3 is installed, it is only necessary to install the bracket 3 to adsorb the suction cup 4 on the lower protection plate 2 to complete the reinforcing connection of the middle position of the lower protection plate 2, and finally, the pressure plate 5 is installed on the case body 1 to press against the battery cell component, thereby ensuring the stability of the installation of the battery cell component.

[0029] In some embodiments, an avoidance hole is provided on the pressure plate 5 at a position corresponding to the protruding pole of each battery cell of the battery cell component. With the arrangement of the avoidance hole, the space occupied by the protruding pole of the battery cell is reduced and the utilization of the space in the receiving cavity 11 is improved, and the limitation of the pole by the hole wall of the avoidance hole improves the stability of the installation of the battery cell.

[0030] In some embodiments, a potting adhesive may be injected into the pressure plate 5 and the bracket 3 during assembly of the battery pack to improve the stability of the installation of the battery cell component and the thermal insulation between the individual battery cells.

[0031] In some embodiments, a condensation rubber pad having good thermal conductivity may be arranged on a side of the lower protective plate 2 facing the holder 3 in order to accelerate the heat dissipation of the battery cell component or the temperature reduction of the thermally transmitted gas.

[0032] It should be understood that in the explanation of this specification, the directional or positional relationships using terms such as "up," "down," etc., are based on the directional or positional relationships shown in the accompanying drawings. They are provided solely for the convenience of explanation and simplification of operation; they do not indicate or imply that the illustrated devices or elements have specific directions or should be constructed and operated in specific directions.

[0033] In the explanation of this specification, the explanation in connection with the terms "one embodiment," etc., refers to the fact that the specific features, structures, materials, or properties explained in connection with the embodiment are included in at least one embodiment or example of the present utility model. In this description, the schematic representations of the above terms do not necessarily refer to the same embodiment.

[0034] Furthermore, it should be understood that each embodiment does not include only an independent technical solution, although the description is explained by means of the embodiment. The explanatory style of the description is used to make the explanation clear. Those skilled in the art should consider the description as a whole; the technical solutions in the respective embodiments can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

[1] Battery housing, characterized by that it comprises a housing body, a lower protective plate, a holder and a suction cup, wherein the housing body has a receiving cavity, and wherein a side of the housing body running along a first direction is provided with an opening which is in communication with the receiving cavity, and wherein the lower protective plate is detachably connected to the opening, and wherein the holder is installed on a cavity wall of the receiving cavity, and wherein the holder and the lower protective plate are spaced apart from one another to form a pressure relief channel, and wherein the pressure relief channel is used to carry out pressure relief on the thermally transmitting gas of the battery cell component on the holder, and wherein the suction cup is arranged on a side of the holder facing the lower protective plate and is supported on the lower protective plate. [2] Battery housing according to claim 1, characterized by that the holder is provided throughout with a plurality of connection holes, wherein the number of connection holes corresponds one to one to the number of battery cells of the battery cell component, and wherein the connection holes are arranged directly opposite the explosion-proof valve of the battery cells. [3] Battery housing according to claim 2, characterized by that a plurality of insertion slots are recessed on a side of the holder facing away from the lower protective plate, wherein the connecting holes are arranged such that they penetrate the slot bottom of the insertion slots, and wherein the insertion slots are used for inserting the battery cells. [4] Battery housing according to one of claims 1 to 3, characterized bythat on a side of the holder facing the lower protective plate, a plurality of support sections are arranged protruding at intervals, wherein at least one suction cup is arranged on each of the support sections. [5] Battery housing according to one of claims 1 to 3, characterized by that an outlet opening is provided on the housing body which is in communication with the pressure relief channel. [6] Battery housing according to claim 5, characterized by that it further includes an explosion-proof tab which is used to block the outlet opening. [7] Battery housing according to one of claims 1 to 3, characterized by that the holder is detachably connected to the cavity wall of the receiving cavity. [8] Battery housing according to claim 7, characterized bythat a guide slot is provided in a recessed manner on the cavity wall of the receiving cavity, wherein the length of the guide slot extends along the first direction, and wherein a guide section is arranged on the holder, which is inserted into the guide slot. [9] Battery pack, characterized by that it comprises a battery cell component and a battery housing according to one of claims 1 to 8, wherein the battery cell component is installed on the holder of the battery housing, and wherein the battery cell component is located on a side of the holder facing away from the lower protective plate. [10] Battery pack according to claim 9, characterized byin that the battery pack further comprises a pressure plate, wherein an installation opening is provided on a side of the housing body of the battery housing facing away from the lower protective plate, which is in communication with the receiving cavity of the housing body, and wherein the pressure plate is arranged at the installation opening, which is used to press against the battery cell component.

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