Cover and battery pack

Abstract

The present application relates to the field of battery technology, and in particular to a cover body and a battery pack for a battery module, wherein the battery module includes a battery cell assembly and a connecting assembly, wherein the battery cell assembly extends in a first direction, and the connecting assembly is arranged at the end of the battery cell assembly in the first direction. The cover body includes a first cover body and a second cover body, wherein the first cover body is fixedly connected to the battery cell assembly, and the second cover body is slidably connected to an end of the first cover body in the first direction, so that the second cover body can move between a first state and a second state. When the second cover body is in the first state, the second cover body blocks the connecting assembly; when the second cover body is in the second state, the connecting assembly is exposed. According to the cover body and the battery pack provided by the present application, the process of disassembling and assembling the cover body when repairing the battery module is avoided, thereby improving the convenience and efficiency of repairing the battery module.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cover and a battery pack. Background Art

[0002] Nowadays, in order to ensure the environmental stability, insulation and service life of the battery module during use, the battery module is usually provided with a shell and an upper cover. The space enclosed by the shell and the upper cover can accommodate the internal structure of the battery module (for example, battery cells, copper bars, etc.). However, when the battery module is inspected, the upper cover usually needs to be removed from the shell to expose the copper bars of the battery module for easy inspection. After the inspection is completed, the upper cover needs to be found, picked up and installed. The operation is cumbersome, which makes the inspection of the battery module inconvenient and affects the inspection efficiency. Utility Model Content

[0003] The purpose of the present application is to provide a cover body and a battery pack, so as to solve to a certain extent the technical problem in the prior art that when repairing the battery module, the upper cover usually needs to be removed from the shell to expose the copper bus of the battery module for easy repair. After the repair is completed, it is necessary to find, pick up and install the upper cover, which is cumbersome to operate, causing inconvenience in the repair of the battery module and affecting the repair efficiency.

[0004] According to a first aspect of the present application, a cover is provided for a battery module, the battery module comprising a battery cell assembly and a connection assembly, the battery cell assembly extending along a first direction, the connection assembly being arranged at an end of the battery cell assembly in the first direction;

[0005] The cover body comprises a first cover body and a second cover body, the first cover body is fixedly connected to the battery core assembly, and the second cover body is slidably connected to one end of the first cover body in the first direction, so that the second cover body can move between a first state and a second state;

[0006] When the second cover body is in the first state, the second cover body covers the connecting component;

[0007] When the second cover body is in the second state, the connecting assembly is exposed.

[0008] Preferably, the first cover body comprises a first covering portion and a slide edge portion, the slide edge portion extends along the first direction and is arranged at two ends of the first covering portion in the second direction, the slide edge portion and the first covering portion both surround a slot extending along the first direction, at least a portion of the second cover body can be inserted into the slot, and the second direction is perpendicular to the first direction;

[0009] The slideway edge portion is arranged on a side of the first covering portion facing the battery core assembly.

[0010] Preferably, the first cover body further comprises a connecting convex rib, and the connecting convex rib is arranged on a side of the first covering portion facing the battery cell assembly;

[0011] The connecting rib extends along the second direction, and the connecting rib extends from the middle of the first covering portion to the inside of the slot.

[0012] Preferably, it further comprises a first latch, the first cover body is provided with a first clamping hole which passes through the first cover body, and the first latch is clamped with the battery cell assembly via the first clamping hole.

[0013] Preferably, the second cover body comprises a second covering portion and an inserting portion which are connected to each other side by side along the first direction, and the second cover body is slidably connected to the slot via the inserting portion.

[0014] Preferably, the second cover body further includes a reinforcement edge extending along the first direction, and the reinforcement edge is arranged on both sides of the second covering portion in the second direction.

[0015] Preferably, a limiting protrusion is provided at the end of the battery cell assembly in the first direction, and the reinforced edge is provided between the limiting protrusion and the slideway edge.

[0016] Preferably, it further includes a second latch, and the second cover body is provided with a second snap-in hole running through the second covering portion, and when the second cover body is in the first state, the second latch is snap-in connected with the battery cell assembly via the second snap-in hole.

[0017] Preferably, the number of the second cover bodies is two, and the two second cover bodies are respectively slidably connected to two ends of the first cover body in the first direction.

[0018] According to the second aspect of the present application, a battery pack is provided, comprising the battery module and cover body described in any of the above technical solutions, and thus having all the beneficial technical effects of the cover body, which will not be described in detail herein.

[0019] Compared with the prior art, the beneficial effects of this application are:

[0020] The cover body provided by the present application is fixedly connected to the battery cell assembly through a first cover body, and the second cover body is slidably connected to one end of the first cover body in the first direction, so that the second cover body can move between a first state and a second state. If the battery module is in use, the second cover body can be moved to the first state so that the second cover body shields the connecting assembly to ensure the stability of the internal environment of the battery module; if the battery module is in repair, the second cover body can be moved to the second state so that the connecting assembly is exposed to facilitate repair of the battery module. In this way, the process of disassembling and assembling the cover body when repairing the battery module is avoided, thereby improving the convenience and efficiency of battery module repair.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the isometric structure of the second cover body of the battery module provided in an embodiment of the present application in a first state;

[0024] Figure 2 A schematic diagram of the isometric structure of the second cover body of the battery module provided in an embodiment of the present application in a second state;

[0025] Figure 3 A schematic diagram of the structure of the cover body provided in an embodiment of the present application in a first state;

[0026] Figure 4 A schematic diagram of the structure of the cover body provided in the embodiment of the present application in the second state;

[0027] Figure 5 A schematic diagram of the explosion structure of the cover provided in an embodiment of the present application;

[0028] Figure 6 A bottom view structural diagram of a cover provided in an embodiment of the present application;

[0029] Figure 7 for Figure 6 A schematic diagram of a partial cross-section structure of a cover body obtained by cutting the cover body along the AA direction is provided;

[0030] Figure 8A schematic diagram of the partial structure of the cover body provided in an embodiment of the present application.

[0031] Reference numerals:

[0032] 1-first cover body; 11-first covering part; 12-slideway edge; 13-connecting rib; 2-second cover body; 21-second covering part; 22-insertion part; 23-reinforced edge; 24-limiting protrusion; 25-thinning limiting groove; 31-first snap-in hole; 32-second snap-in hole; 4-battery module; 41-battery cell assembly; 42-connecting assembly.

[0033] F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0035] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0036] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Refer to the following Figures 1 to 8 The cover and the battery pack according to some embodiments of the present application are described.

[0040] See also Figures 1 to 8 As shown, an embodiment of the first aspect of the present application provides a cover body for a battery module 4, wherein the battery module 4 includes a battery cell assembly 41 and a connecting assembly 42, the battery cell assembly 41 extends along a first direction F1, and the connecting assembly 42 is arranged at the end of the battery cell assembly 41 in the first direction F1. The cover body includes a first cover body 1 and a second cover body 2, the first cover body 1 is fixedly connected to the battery cell assembly 41, and the second cover body 2 is slidably connected to one end of the first cover body 1 in the first direction F1, so that the second cover body 2 can move between a first state and a second state. When the second cover body 2 is in the first state, the second cover body 2 blocks the connecting assembly 42; when the second cover body 2 is in the second state, the connecting assembly 42 is exposed.

[0041] According to the cover body provided by the above-mentioned technical features, the first cover body 1 is fixedly connected to the battery cell assembly 41, and the second cover body 2 is slidably connected to one end of the first cover body 1 in the first direction F1, so that the second cover body 2 can move between the first state and the second state. If the battery module 4 is in use, the second cover body 2 can be moved to the first state so that the second cover body 2 covers the connecting assembly 42 to ensure the stability of the internal environment of the battery module 4; if the battery module 4 is in maintenance, the second cover body 2 can be moved to the second state so that the connecting assembly 42 is exposed to facilitate the maintenance of the battery module 4. In this way, the process of disassembling and assembling the cover body when repairing the battery module 4 is avoided, thereby improving the convenience and efficiency of repairing the battery module 4.

[0042] like Figures 1 to 8 As shown, F1 shown in the figure may be an example of the first direction F1, and F2 shown in the figure may be an example of the second direction F2 described below. The second direction F2 is perpendicular to the first direction F1. For the convenience of description, the direction perpendicular to the plane determined by the first direction F1 and the second direction F2 is referred to as the third direction F3, and F3 shown in the figure may be an example of the third direction F3.

[0043] Optionally, the battery cell assembly 41 may include a plurality of battery cells. Figure 2 As shown, the plurality of battery cells may be stacked along a first direction F1 to form a battery cell row, and the battery cell assembly 41 may include a plurality of battery cell rows, and the plurality of battery cell rows are arranged side by side along a second direction F2.

[0044] Alternatively, if Figure 2As shown, the connection component 42 may be disposed at the end of the cell component 41 in the first direction F1 , and the connection component 42 may be a bus bar and / or other electrical connection structure (eg, a copper bus bar connection structure) connecting the cell columns.

[0045] Preferably, if Figure 6 and Figure 7 As shown, the first cover body 1 may include a first cover portion 11 and a slide edge portion 12, the slide edge portion 12 extends along the first direction F1 and is arranged at both ends of the first cover portion 11 in the second direction F2, the slide edge portion 12 and the first cover portion 11 both surround a slot extending along the first direction F1, and at least a portion of the second cover body 2 can be inserted into the slot. In this way, the sliding connection between the second cover body 2 and the first cover body 1 is achieved by inserting at least a portion of the second cover body 2 into the slot.

[0046] Preferably, if Figure 6 As shown, the slide edge 12 is arranged on the side of the first cover portion 11 facing the battery cell assembly 41, so that the slot can be hidden between the first cover portion 11 and the battery cell assembly 41, effectively ensuring the neatness of the cover.

[0047] Preferably, if Figure 6 As mentioned above, the first cover body 1 may further include a connecting rib 13 , which is disposed on a side of the first covering portion 11 facing the battery cell assembly 41 , so as to ensure the anti-deformation strength of the first covering portion 11 .

[0048] Preferably, if Figure 6 The connecting rib 13 extends along the second direction F2, and the connecting rib 13 extends from the middle of the first covering portion 11 to the slot. In this way, the first cover body 1 can limit the second cover body 2 through the connecting rib 13, thereby ensuring the movement accuracy of the second cover body 2.

[0049] It should be noted that if Figure 6 As shown, the connecting rib 13 may extend along the second direction F2 , and the connecting rib 13 may be disposed at a midline position of the first covering portion 11 in the first direction F1 .

[0050] Preferably, the first covering portion 11 , the connecting rib 13 and the slideway edge portion 12 may be integrally formed and connected.

[0051] Preferably, if Figures 3 to 6 As shown, the first cover body 1 may be provided with a first snap-fitting hole 31 that runs through the first cover body 1. Correspondingly, not shown in the figure, the cover body may also include a first latch that may be snap-fitted with the battery cell assembly 41 via the first snap-fitting hole 31 to achieve the fixation of the first cover body 1 and the battery cell assembly 41.

[0052] Optionally, not shown in the figures, the battery cell assembly 41 may further include a battery cell bracket, which may be covered on the plurality of battery cell columns to achieve fixation between the battery cells in the battery cell columns.

[0053] Preferably, although not shown in the figure, the battery cell bracket may further include a first clamping hole. When the first cover body 1 is covered on the battery cell assembly 41, the first clamping hole and the first clamping hole 31 are arranged relative to each other in the third direction F3. In this way, the first latch can pass through the first clamping hole 31 and be clamped with the first clamping hole, thereby improving the fixing accuracy of the battery cell assembly 41 and the first cover body 1.

[0054] Preferably, if Figure 6 As shown, the first clamping hole 31 may be disposed on the connecting rib 13 , so as to reduce the influence of the first clamping hole 31 on the anti-deformation strength of the first cover body 1 .

[0055] Similarly, if Figure 3 Character Figure 6 The second cover body 2 may also be provided with a second snap-fit ​​hole 32 that runs through the second cover portion 21. Correspondingly, not shown in the figure, the cover body may also include a second latch, and when the second cover body 2 is in the first state, the second latch is snap-fitted with the battery cell assembly 41 via the second snap-fit ​​hole 32.

[0056] Similarly, not shown in the figure, the above-mentioned battery cell holder may also include a second clamping hole. When the second cover body 2 is in the first state, the second clamping hole and the second clamping hole 32 are arranged relative to each other in the third direction F3. In this way, the above-mentioned second pin can pass through the second clamping hole 32 and be clamped with the second clamping hole, thereby ensuring that when the second cover body 2 is in the first state, the second cover body 2 and the battery cell assembly 41 are arranged stably.

[0057] In an embodiment, Figure 5 As described above, the second cover body 2 includes a second covering portion 21 and an inserting portion 22 which are connected to each other side by side along the first direction F1 , and the second cover body 2 is slidably connected to the slot via the inserting portion 22 .

[0058] Preferably, if Figure 5 As shown, in the third direction F3, the thickness of the second covering portion 21 is greater than the thickness of the insertion portion 22. Thus, on the first hand, the sliding smoothness of the insertion portion 22 in the slot is ensured; on the second hand, the deformation resistance of the second covering portion 21 can be effectively improved; on the third hand, the boss formed by the different thicknesses of the second covering portion 21 and the insertion portion 22 can effectively limit the range of the slot that the second cover body 2 can be inserted into, thereby ensuring the position accuracy of the second cover body 2 in the second state.

[0059] Preferably, if Figure 3and Figure 6 As shown, the second cover body 2 may further include a reinforcement edge 23 extending along the first direction F1 , and the reinforcement edge 23 is disposed on both sides of the second covering portion 21 in the second direction F2 to further improve the anti-deformation strength of the second covering portion 21 .

[0060] Preferably, if Figure 8 As shown, a limiting protrusion 24 can be provided at the end of the above-mentioned battery cell assembly 41 in the first direction F1, and the reinforcing edge 23 is provided between the limiting protrusion 24 and the slide edge 12. In this way, the limiting protrusion 24 can effectively prevent the second cover body 2 from sliding out of the battery module 4 from the end of the battery cell assembly 41, thereby effectively reducing the probability of the second cover body 2 falling off the battery module 4.

[0061] Alternatively, if Figure 6 As shown, the second covering portion 21 may also be provided with a thinning limit groove 25. When the second cover body 2 is in the first state, the thinning limit groove 25 is provided corresponding to the limit protrusion 24, thereby avoiding interference between the second cover body 2 and the limit protrusion 24 during sliding.

[0062] Preferably, a plurality of the above-mentioned limiting protrusions 24 can be arranged at intervals along the second direction F2 on one end of the battery cell assembly 41 in the first direction F1 to ensure the limiting stability of the limiting protrusions 24 on the second cover body 2. Figure 2 The example shown is that two limiting protrusions 24 are provided at one end of the battery cell assembly 41 in the first direction F1.

[0063] In an embodiment, preferably, Figures 1 to 6 As shown, the number of the second cover bodies 2 can be two, and the two second cover bodies 2 are respectively slidably connected to the two ends of the first cover body 1 in the first direction F1. In this way, when the battery module 4 needs to be repaired, the cover body can expose the two ends of the battery module 4 in the first direction F1 at the same time, effectively increasing the maintenance operation space and further facilitating the maintenance operation of the battery module 4.

[0064] Optionally, the cover may be a flame-retardant PC member to ensure the insulation and safety of the battery module 4 .

[0065] The embodiment of the second aspect of the present application further provides a battery pack, comprising the battery module 4 and the cover body described in any of the above embodiments, and thus having all the beneficial technical effects of the cover body, which will not be repeated here.

[0066] Preferably, the battery module 4 may include a cell assembly 41 and a connection assembly 42 .

[0067] Preferably, the cell assembly 41 may include the cell support and the plurality of cell rows. The connection assembly 42 may also include the busbar and / or other electrical connection structures (eg, copper busbar connection structures).

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cover for a battery module, characterized in that: The battery module comprises a battery cell assembly and a connecting assembly, the battery cell assembly extends along a first direction, and the connecting assembly is arranged at an end of the battery cell assembly in the first direction; The cover body comprises a first cover body and a second cover body, the first cover body is fixedly connected to the battery core assembly, and the second cover body is slidably connected to one end of the first cover body in the first direction, so that the second cover body can move between a first state and a second state; When the second cover body is in the first state, the second cover body covers the connecting component; When the second cover body is in the second state, the connecting assembly is exposed.

2. The cover according to claim 1, characterized in that: The first cover body comprises a first covering portion and a slide edge portion, the slide edge portion extends along the first direction and is arranged at two ends of the first covering portion in the second direction, the slide edge portion and the first covering portion both surround a slot extending along the first direction, at least a portion of the second cover body can be inserted into the slot, and the second direction is perpendicular to the first direction; The slideway edge portion is arranged on a side of the first covering portion facing the battery core assembly.

3. The cover according to claim 2, characterized in that: The first cover body further comprises a connecting convex rib, and the connecting convex rib is arranged on a side of the first covering portion facing the battery core assembly; The connecting rib extends along the second direction, and the connecting rib extends from the middle of the first covering portion to the inside of the slot.

4. The cover according to claim 1, characterized in that: It also includes a first latch, and the first cover body is provided with a first clamping hole that runs through the first cover body, and the first latch is clamped with the battery core assembly via the first clamping hole.

5. The cover according to claim 2, characterized in that: The second cover body includes a second covering portion and an inserting portion which are connected to each other side by side along the first direction, and the second cover body is slidably connected to the slot via the inserting portion.

6. The cover according to claim 5, characterized in that: The second cover body further includes a reinforcement edge extending along the first direction, and the reinforcement edge is arranged on both sides of the second covering portion in the second direction.

7. The cover according to claim 6, characterized in that: A limiting protrusion is provided at the end of the battery cell assembly in the first direction, and the reinforcement edge is provided between the limiting protrusion and the slideway edge.

8. The cover according to claim 5, characterized in that: It also includes a second latch, and the second cover body is provided with a second clamping hole that passes through the second covering portion. When the second cover body is in the first state, the second latch is clamped with the battery cell assembly via the second clamping hole.

9. The cover according to any one of claims 1 to 8, characterized in that: The number of the second cover bodies is two, and the two second cover bodies are respectively slidably connected to two ends of the first cover body in the first direction.

10. A battery pack, characterized in that: The invention comprises the battery module and the cover body according to any one of claims 1 to 9.

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