Soft package battery module and battery module

Abstract

The utility model discloses a soft-package battery module and a battery module, the soft-package battery module comprises a protective shell and soft-dry soft-package battery cells, the protective shell is provided with a cavity and a pole, each soft-package battery cell is arranged in the cavity, each soft-package battery cell is provided with a tab, and the tab is electrically connected to the pole. In the embodiment of the invention, the tab of the soft package battery cell is transferred to the pole on the surface of the protective shell, so that the assembly of the soft package battery module is facilitated, in the assembly process, the tab of the soft package battery cell does not need to be bent, the pole on the protective shell is directly connected with the aluminum bar on the bus board, and the assembly efficiency of the battery module is improved.

Description

Technical Field

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

[0002] The busbar of the soft-pack battery module is usually densely provided with a large number of narrow grooves. During the assembly of the battery module, the tabs of each soft-pack battery cell are respectively passed through the corresponding narrow grooves, which is difficult to operate. After all the tabs have passed through the corresponding narrow grooves, each tab needs to be bent so that each tab fits the conductive sheet on the busbar. In the prior art, the assembly process of the soft-pack battery module is multi-step, the operation is difficult, and it is not conducive to improving work efficiency.

[0003] In view of this, the present utility model is proposed. Summary of the invention

[0004] The utility model provides a soft-pack battery module and a battery module.

[0005] The utility model adopts the following technical solutions:

[0006] The first object of the present application is to provide a soft pack battery module, comprising:

[0007] A protective shell, wherein the protective shell has a cavity and a pole;

[0008] A plurality of soft-pack battery cells are provided in the cavity, and the soft-pack battery cells have pole tabs, and the pole tabs are electrically connected to the poles.

[0009] Optionally, the protective shell comprises a main body and a cover body, the main body is provided with at least a portion of the cavity, the cover body is provided with the pole, and the cover body is connected to the main body;

[0010] The soft-pack battery cell is arranged in the cavity of the main body, and the pole lug of the soft-pack battery cell extends out of the main body and is electrically connected to the pole.

[0011] Optionally, the cover body has a top wall and a side wall connected to the top wall;

[0012] The pole is arranged on the top wall;

[0013] The side wall is detachably connected to the main body.

[0014] Optionally, the pole is in a sheet shape, the pole is parallel to the top wall, and the pole protrudes from the outer surface of the top wall.

[0015] Optionally, the pole and the cover are injection molded into an integral piece.

[0016] Optionally, the pole includes a fixing sheet and an electrical connection sheet;

[0017] The cross-sectional area of ​​the fixing sheet portion is greater than the cross-sectional area of ​​the electrical connection sheet portion;

[0018] The fixing sheet portion is at least partially located inside the top wall, and the electrical connection sheet portion is at least partially protruding from the outer surface of the top wall.

[0019] Optionally, the soft-pack battery module includes an electrical connector, which is located between the main body and the cover, and is electrically connected to the tabs and corresponding poles of each battery cell.

[0020] Optionally, the electrical connector is in sheet shape;

[0021] One side of the electrical connector is attached to the pole, and the electrical connector and the pole are fixed by welding.

[0022] Optionally, the other side of the electrical connector and the tabs of each battery cell are sequentially fitted in the thickness direction, and the electrical connector and the tabs are fixed by welding using an ultrasonic welding process.

[0023] The second object of the present application is to provide a battery module, comprising:

[0024] Multiple soft pack battery modules;

[0025] A busbar, wherein the busbar cover is disposed on each of the soft-pack battery modules, and a plurality of aluminum bars are arranged on the busbar, and each of the aluminum bars is electrically connected to a pole of a corresponding soft-pack battery module to electrically connect each of the soft-pack battery cells.

[0026] By adopting the above technical solution, the utility model has the following beneficial effects:

[0027] In the disclosed embodiment, the pole ears of the soft-pack battery cell are transferred to the pole posts on the surface of the protective shell, thereby facilitating the assembly of the soft-pack battery module. During the assembly process, there is no need to bend the pole ears of the soft-pack battery cell, and the pole posts on the protective shell and the aluminum bars on the busbar can be directly connected, thereby improving the assembly efficiency of the battery module.

[0028] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] Figure 1 A schematic diagram showing the structure of a battery module provided by an embodiment of the present disclosure is shown;

[0031] Figure 2 A schematic diagram of the structure of a soft-pack battery module in a battery module provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the partial structure of a soft-pack battery module in a battery module provided in an embodiment of the present application;

[0033] Figure 4 A cross-sectional view of a partial structure of a soft-pack battery module in a battery module provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the structure of a cell module in a battery module provided in an embodiment of the present application;

[0035] Figure 6 for Figure 5 Exploded diagram of

[0036] Figure 7 A schematic diagram of the matching structure of the heat conducting plate and the first clamping shell of the battery cell module in the battery module provided in an embodiment of the present application.

[0037] In the figure, 1, protective shell; 11, shell assembly; 111, first clamping shell; 1111, main shell; 1112, baffle; 11121, slot; 11122, convex part; 11123, concave part; 1113, limiting rib; 112, second clamping shell; 1121, convex part; a, hollow groove; b, positioning cutout; 12, cover; 121, top wall; 1211, pole; 121 11. Fixed sheet; 12112. Electrical connection sheet; 122. Side wall; 1221. Avoidance; 1222. Slot; 123. Isolation rib; 2. Soft-pack battery cell; 21. Main body; 22. Edge sealing; 23. Tab; 3. Electrical connector; 4. Busbar; 41. Aluminum bar; 6. Steel belt; 7. Heat conducting plate; 71. Main board; 72. Side board; 8. End board; 81. Output socket.

[0038] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0042] See also Figures 1 to 7 As shown, the battery module provided in the first embodiment of the present application may be a soft-pack battery module, including: a protective shell 1 and a plurality of soft-pack battery cells 2. The protective shell 1 has a cavity and a pole 1211, the soft-pack battery cell 2 is arranged in the cavity, and the soft-pack battery cell 2 has a pole ear 23, and the pole ear 23 is electrically connected to the pole 1211.

[0043] In the disclosed embodiment, the pole ear 23 of the soft-pack battery cell 2 is transferred to the pole post 1211 on the surface of the protective shell 1, thereby facilitating the assembly of the soft-pack battery module. During the assembly process, there is no need to bend the pole ear 23 of the soft-pack battery cell 2, and the pole post 1211 on the protective shell 1 and the aluminum bar 41 on the busbar 4 can be directly connected, thereby improving the assembly efficiency of the battery module.

[0044] In some possible embodiments, the protective shell 1 includes a main body and a cover 12, at least part of the cavity is provided on the main body, the pole 1211 is provided on the cover 12, the cover 12 is connected to the main body, the soft-pack battery cell 2 is provided in the cavity of the main body, and the pole lug 23 of the soft-pack battery cell 2 extends out of the main body and is electrically connected to the pole 1211. The pole 1211 passes through the shell wall of the cover 12, and the structure of the pole 1211 located on the inner side of the shell wall is convenient for connection with the pole lug 23, and the structure of the pole 1211 located outside the shell wall of the cover 12 can be used to connect with the aluminum bar on the busbar 4.

[0045] In some possible implementations, the cover 12 has a top wall 121 and a side wall 122 connected to the top wall 121, a pole 1211 is disposed on the top wall 121, and the side wall 122 is detachably connected to the main body. The pole 1211 is disposed through the top wall 121, which is convenient for connection with the aluminum bar 41 and the pole ear 23 of the soft-pack battery cell 2.

[0046] In some possible implementations, the pole 1211 is in sheet shape, the pole 1211 is parallel to the top wall 121, and the pole 1211 protrudes from the outer surface of the top wall 121. The top wall 121 is the topmost part of the soft-pack battery module. When the busbar 4 is covered on the top wall 121, the aluminum bars 41 on the busbar 4 can smoothly contact the pole 1211 on the top wall 121, which is convenient for further welding and fixing.

[0047] In some possible implementations, the pole 1211 and the cover 12 are injection molded into an integral part. The cover 12 is plastic, and the pole 1211 is metal. The plastic can be injected into the mold using a high-pressure injection molding machine and closely attached to the pole 1211 coated with special ink. After a certain pressure and temperature treatment, the plastic and the pole 1211 are tightly combined into one, and finally an integrated plastic composite part is formed.

[0048] In some possible implementations, see Figure 4 As shown, the pole 1211 includes a fixing piece 12111 and an electrical connection piece 12112. The cross-sectional area of ​​the fixing piece 12111 is larger than the cross-sectional area of ​​the electrical connection piece 12112. The fixing piece 12111 is at least partially located inside the top wall 121, and the electrical connection piece 12112 at least partially protrudes from the outer surface of the top wall 121. The fixing piece 12111 can be formed into an integral piece with the cover body 12 by injection molding. The fixing piece 12111 is large in size, which can increase the contact area with the plastic and improve the strength and stability of the injection molding structure.

[0049] In some possible implementations, the soft pack battery module includes an electrical connector 3, which is a metal part, and is located between the main body and the cover 12, and the electrical connector 3 is electrically connected to the tabs 23 of each of the battery cells and the corresponding poles 1211. The provision of the electrical connector 3 can make up for the length of the tabs 23 and smoothly connect the tabs 23 to the poles 1211.

[0050] In some possible implementations, see Figure 3 and Figure 4As shown, the electrical connector 3 can be in sheet shape, one side of the electrical connector 3 is attached to the pole 1211, and the electrical connector 3 and the pole 1211 are welded and fixed. The other side of the electrical connector 3 and the pole lug 23 of each battery cell are attached in sequence along the thickness direction, and the electrical connector 3 and each pole lug 23 are welded and fixed by ultrasonic welding process. When the soft-pack battery module includes two soft-pack batteries 2, the electrical connector 3 is located between the same-pole pole lugs 23 of the two soft-pack batteries 2.

[0051] The poles 1211 on the cover 12 are respectively the positive pole 1211 and the negative pole 1211. When the soft-pack battery module includes a plurality of soft-pack cells 2, the soft-pack cells 2 in the protective shell 1 are in parallel, and the positive pole tabs 23 and the negative pole tabs 23 of each soft-pack cell 2 are located on the same side, so that each positive pole tab 23 is conveniently connected to the positive pole 1211 through an electrical connector 3, and each negative pole tab 23 is conveniently connected to the negative pole 1211 through an electrical connector 3. In the embodiment of the present disclosure, at least two soft-pack cells 2 in parallel are arranged in the protective shell 1, and each parallel soft-pack cell 2 shares the positive pole 1211 and the negative pole 1211 on the protective shell 1, so as to reduce the number of connections between the soft-pack cells 2 and the aluminum bars 41 on the busbar 4, which is conducive to reducing the number of aluminum bars 41, so that the gap between each aluminum bar 41 on the busbar 4 is large, and short circuit is not easy to occur.

[0052] It should be noted that the cover 12 and the pole 1211 can be an integrally formed part, which can be directly provided by the supplier. The electrical connector 3 can also be pre-welded to the pole 1211 at one end. In the assembly workshop, it is only necessary to fit the other end of the electrical connector 3 to the pole ear 23 and weld them using an ultrasonic welding process, which significantly improves the assembly efficiency.

[0053] This embodiment also provides a battery module, including: a plurality of soft-pack battery modules and a busbar 4, wherein the busbar 4 is covered on each of the soft-pack battery modules, and a plurality of aluminum bars 41 are arranged on the busbar 4, and each of the aluminum bars 41 is electrically connected to the pole 1211 of the corresponding soft-pack battery module to electrically connect each of the soft-pack battery cells 2. Embodiment 2

[0054] See also Figure 5 and Figure 6As shown, the embodiment of the present application provides a battery cell module, and the shell structure (i.e., shell assembly) of several battery cell modules after removing the soft-pack battery cells can form a main body. The battery cell module includes: a shell assembly 11 and a soft-pack battery cell 2, and the shell assembly 11 includes a first clamping shell 111 and a second clamping shell 112, and the first clamping shell 111 and the second clamping shell 112 both have a hollow groove a, and the first clamping shell 111 and the second clamping shell 112 are detachably connected. The soft-pack battery cell 2 includes a main body 21 and an edge sealing portion 22 located around the edge of the main body 21, and the edge sealing portion 22 is clamped between the first clamping shell 111 and the second clamping shell 112, and the two side structures of the main body 21 along the thickness direction are respectively located in the hollow groove a of the first clamping shell 111 and the hollow groove a of the second clamping shell 112. The setting of the hollow groove a can facilitate the heat dissipation of the soft-pack battery cell 2. The first clamping shell 111 and the second clamping shell 112 can be clamped on the peripheral side sealing portion 22 of the soft-pack battery cell 2 without affecting the deformation of the soft-pack battery cell 2. At the same time, the soft-pack battery cell 2 can be stably fixed to improve the assembly structure stability of the soft-pack battery cell 2.

[0055] In some possible embodiments, the first clamping shell 111 has a main shell 1111 and a baffle 1112 located at the edge of the main shell 1111 , the second clamping shell 112 is embedded in the inner side of the baffle 1112 of the first clamping shell 111 , and the edge sealing portion 22 is clamped between the main shell 1111 and the second clamping shell 112 .

[0056] The second clamping shell 112 is embedded in the inner side of the baffle 1112 of the first clamping shell 111, reducing the overall thickness of the shell assembly 11. The energy density of the battery module is improved. In the state where the second clamping shell 112 is accommodated in the inner side of the baffle 1112, the second clamping shell 112 will not protrude from the side of the baffle 1112 away from the main shell 1111. Similarly, the two sides of the main body 21 along the thickness direction may not protrude from the two sides of the baffle 1112, and the thickness of the entire first clamping shell 111 (even the battery cell module) is roughly the thickness of the baffle 1112.

[0057] In some possible embodiments, the first clamping shell 111 (or the main shell 1111) includes four first frame bars arranged in sequence along the circumferential direction, each of the first frame bars is provided with a baffle 1112, and the four first frame bodies are combined to form a hollow groove a. The second clamping shell 112 includes four second frame bars arranged in sequence along the circumferential direction, the four second frame bars are arranged in sequence, and the two adjacent ones are vertically connected, and the four second frame bars are combined to form a hollow groove a, and the edge sealing portions 22 on the four sides of the soft-pack battery cell 2 are respectively clamped by the corresponding first frame bars and the second frame bars.

[0058] In some possible implementation schemes, the tabs 23 (including the positive tab and the negative tab) of the soft-pack battery cell 2 extend out of the shell assembly 11 to facilitate connection to an external circuit structure.

[0059] In some possible implementation schemes, a slot 11121 is provided on the baffle 1112, and a protrusion 1121 is provided on the peripheral end surface of the second clamping shell 112, and the protrusion 1121 is clamped in the corresponding slot 11121. The peripheral end surface of the second clamping shell 112, that is, the thickness end surface, is provided with a protrusion 1121, and when the second clamping shell 112 is embedded in the inner side of the baffle 1112, the protrusion 1121 can be clamped in the slot 11121 on the baffle 1112, and the assembly structure is simple, which is conducive to improving assembly efficiency. A plurality of protrusions 1121 can be provided on the peripheral end surface of the second clamping shell 112, and each of the protrusions 1121 is arranged in sequence and spaced along the extension direction of the peripheral end surface. Similarly, a plurality of slots 11121 are correspondingly provided on the baffle 1112 , and each locking protrusion 1121 can be respectively engaged in the corresponding slot 11121 , thereby improving the assembly structure stability of the first clamping shell 111 and the second clamping shell 112 .

[0060] In some possible embodiments, combined with Figure 3 and Figure 6 As shown, the baffle 1112 is provided with a convex portion 11122 and a concave portion 11123 on both sides of the thickness direction of the battery module. When a plurality of battery modules are arranged in sequence, the convex portion 11122 of one of the two adjacent battery modules is inserted into the concave portion 11123 of the other, so that in each battery module arranged in sequence, the two adjacent limiters are matched, and the two will not be misaligned in the plane where the main shell 1111 is located. The convex portion 11122 and the concave portion 11123 can be respectively provided on both sides of the baffle 1112 along the width direction. The convex portion 11122 and the concave portion 11123 are provided on at least the baffle 1112 located on both sides of the battery module along the width direction.

[0061] See also Figure 2 , Figure 3 and Figure 4 As shown, the embodiment of the present application also provides a battery module, including: a cover body 12 and at least two of the above-mentioned battery modules, a pole 1211 is arranged on the cover body 12, and the cover body 12 is arranged on each of the battery modules, and the pole lugs 23 of the soft-pack battery 2 on each of the battery modules are connected to the corresponding pole 1211. In the embodiment of the present disclosure, the pole 1211 is arranged on the cover body 12, and the soft-pack battery module is directly connected to the pole 1211, so that the assembly process of the battery module can be changed and the assembly difficulty of the battery module can be reduced. The ordinary soft-pack battery is converted into a square battery that is easy to assemble, which facilitates the assembly of the CCS board and multiple battery modules.

[0062] In some possible implementations, a protective cavity is formed between the cover 12 and each of the battery modules, and the tabs 23 extend into the protective cavity, thereby preventing interference between the tabs 23 and external structures.

[0063] In some possible implementations, the cover 12 has a top wall 121, a side wall 122 and an isolation rib 123, and the side wall 122 and the isolation rib 123 are both connected to the top wall 121. When the cover 12 is connected to each of the battery modules, the side wall 122 of the cover 12 is clamped on the two battery modules at both ends, and the protection cavity is formed between the top wall 121 and each of the battery modules. The positive pole tab and the negative pole tab of each battery module are respectively located on both sides of the isolation rib 123. The isolation rib 123 not only plays a role in enhancing the structural strength of the cover 12, but also can isolate the positive pole tab 23 from the negative pole tab 23, avoid short circuit, and improve safety.

[0064] In some possible implementations, see Figure 4 and Figure 5 As shown, a positioning cutout b is provided on the shell assembly 11 of the cell module, and when the cover 12 is connected to each of the cell modules, the isolation ribs 123 on the cover 12 are plugged into the positioning cutout b. The positioning cutout b is provided to facilitate accurate assembly of the cover 12 and improve assembly efficiency.

[0065] Specifically, the top edge of the main shell 1111 may not be provided with a baffle, the top end surface of the main shell 1111 and the top end surface of the second clamping shell 112 are located in the same plane, and the top end surface of the main shell 1111 and the top end surface of the second clamping shell 112 are both provided with positioning cutouts b, and the two positioning cutouts b are located in the same straight line. The isolation rib 123 has a plug-in plate extending along the width direction of the cover body 12, and the plug-in plate is simultaneously plugged into the two cutouts, thereby realizing the mutual positioning of the cover body 12 and the shell assembly 11. The two sides of the plug-in plate can be vertically connected with bonding plates, which can also be understood as a part of the structure of the side wall 122. The provision of the bonding plate increases the bonding surface of the side wall 122 of the cover body 12 of the adjacent battery module, which is conducive to the smooth matching of the cover body 12 of the adjacent battery module, avoids scratching the cover body 12, and is conducive to improving the assembly structure stability of each battery module.

[0066] See also Figure 1 As shown, the present application also provides a battery module, including: a plurality of battery modules and a steel belt 6, wherein the battery modules are arranged in sequence along a straight line, and the steel belt 6 is sleeved on each of the battery modules to fix each of the battery modules. Embodiment 3

[0067] See also Figures 1 to 7As shown, the cell module provided in the embodiment of the present application can be a soft-pack cell module with good heat dissipation, including: a shell component 11, a soft-pack cell 2 and a heat conducting plate 7. The shell component 11 has a hollow groove a, the soft-pack cell 2 is fixed in the shell component 11, and the soft-pack cell 2 is exposed in the hollow groove a, the heat conducting plate 7 is connected to the shell component 11, and the heat conducting plate 7 is attached to the soft-pack cell 2.

[0068] The shell assembly 11 is provided with a hollow groove a, so that the surface of the soft-pack battery cell 2 is exposed, which is convenient for contacting with the heat-conducting plate 7 for heat dissipation. The soft-pack battery cell module provided in the embodiment of the present application is provided with a heat-conducting plate 7, which is directly attached to the soft-pack battery cell 2 and can contact the water-cooling plate of the battery pack, thereby cooling the soft-pack battery cell 2, so that the soft-pack battery cell 2 maintains good performance.

[0069] The heat conducting plate 7 is attached to the outer surface of the housing assembly 11, and the heat conducting plate 7 covers the hollow groove a. The heat conducting plate 7 and the entire surface of the soft-pack battery cell 2 exposed in the hollow groove a are attached, and the contact area between the soft-pack battery cell 2 and the heat conducting plate 7 is large, and the cooling effect is good.

[0070] In some possible embodiments, the shell assembly 11 includes a first clamping shell 111 and a second clamping shell 112, at least one of the first clamping shell 111 and the second clamping shell 112 has a hollow groove a, the first clamping shell 111 and the second clamping shell 112 are detachably connected, the soft-pack battery cell 2 includes a main body 21 and a sealing edge 22 located around the edge of the main body 21, the sealing edge 22 is clamped between the first clamping shell 111 and the second clamping shell 112, the main body 21 is exposed in the hollow groove a, and the heat conducting plate 7 is attached to the main body 21. There is an electrolyte and some structures inside the main body 21, and the main body 21 is a heat source. The heat conducting plate 7 directly contacts the main body 21 and can effectively exchange heat with the soft-pack battery cell 2.

[0071] In some possible embodiments, a hollow groove a is provided on the first clamping shell 111 and the second clamping shell 112, and both sides of the main body 21 along the thickness direction extend to the hollow grooves a on the first clamping shell 111 and the second clamping shell 112 respectively, and the heat conducting plate 7 is connected to any one of the first clamping shell 111 and the second clamping shell 112, and closes the corresponding hollow groove a.

[0072] The first clamping shell 111 has a main shell 1111 and a baffle 1112 located at the edge of the main shell 1111. The main shell 1111 is enclosed to form the hollow groove a. The second clamping shell 112 is embedded in the inner side of the baffle 1112 of the first clamping shell 111. The edge sealing portion 22 is clamped between the main shell 1111 and the second clamping shell 112. The heat conducting plate 7 is connected to the side of the first clamping shell 111 away from the second clamping shell 112. The first clamping shell 111 is relatively large in size, which can facilitate the installation of the heat conducting plate 7 and increase the contact area between the heat conducting plate 7 and the soft-pack battery cell 2. The heat conducting plate 7 can be an aluminum plate or other metal plate with good thermal conductivity.

[0073] In some possible implementations, see Figure 7 As shown, the surface of the first clamping shell 111 is provided with a limiting rib 1113, and when the heat conducting plate 7 is attached to the first clamping shell 111, the limiting rib 1113 is limited to the edge of the heat conducting plate 7. The limiting rib 1113 plays the role of limiting the heat conducting plate 7, which improves the assembly structure stability of the heat conducting plate 7, and is conducive to the rapid and accurate installation of the heat conducting plate 7, thereby improving the installation efficiency of the heat conducting plate 7. The limiting rib 1113 is provided on the side of the surface of the first clamping shell 111 away from the second clamping shell 112, and the limiting rib 1113 extends around the hollow groove a. There is an annular support surface between the limiting rib 1113 and the hollow groove a, and the heat conducting plate 7 is attached to the annular support surface. The surface of the soft-pack battery 2 can be flush with the annular support surface, so that the heat conducting plate 7 and the surface of the soft-pack battery 2 are attached, and heat exchange can be effectively performed.

[0074] It should be noted that the limiting rib 1113 can be understood as a part of the structure of the baffle 1112. The structure of the baffle 1112 located on one side of the heat conducting plate 7 can be understood as the limiting rib 1113.

[0075] In some possible implementation schemes, the heat conducting plate 7 is bonded to the shell assembly 11 by colloid. Specifically, it is bonded to the annular support surface. The heat conducting plate 7 has a main board body 71 and a side plate body 72 connected to the main board body 71, the main board body 71 is located on one side of the shell assembly 11 along the thickness direction, and the main board body 71 covers the hollow groove a, fits on the soft-pack battery cell 2, and the side plate body 72 is located on the thickness end surface of the shell assembly 11. Specifically, the side plate body 72 is located on the thickness end surface of the bottom of the shell assembly 11. When the battery cell module is installed on the box body of the battery pack, the side plate body 72 fits on the water-cooling plate on the box body, thereby achieving the goal of guiding the heat on the soft-pack battery cell 2 to the water-cooling plate.

[0076] The limiting rib 1113 can be partially disposed on the side of the first clamping shell 111 away from the second clamping shell 112, and partially disposed on the bottom end surface of the first clamping shell 111. The limiting rib 1113 can be a closed ring as a whole. The limiting rib 1113 located on the surface of the first clamping shell 111 away from the second clamping shell 112 is limited to the peripheral side of the main plate body 71, and the limiting rib 1113 located on the bottom end surface of the first clamping shell 111 is limited to the peripheral side of the side plate body 72.

[0077] This embodiment also provides a battery module, including: a steel belt 6 and a plurality of the above-mentioned soft-pack battery cell modules with good heat dissipation, each of the soft-pack battery cell modules is arranged in sequence along a straight line, and the steel belt 6 is sleeved on each of the soft-pack battery cell modules.

[0078] This embodiment also provides a battery pack, including: a water cooling plate and the above-mentioned battery module, wherein the heat conducting plate 7 of each soft-pack battery cell module of the battery module is attached to the water cooling plate. Embodiment 4

[0079] See also Figures 1 to 7 As shown, an embodiment of the present application provides a transfer-type soft-pack battery, including: a box, a battery assembly and a busbar 4. The battery assembly, the busbar and other structures can form a battery module. The box has a cavity, and the battery assembly is arranged in the cavity. The battery assembly includes a plurality of battery modules, each of which is arranged in sequence, and each of the battery modules includes a protective shell 1 and a soft-pack battery cell 2. The protective shell 1 is provided with a pole 1211, and the soft-pack battery cell 2 is arranged in the protective shell 1, and the pole ear 23 of the soft-pack battery cell 2 is connected to the pole 1211. The busbar 4 is arranged in the cavity, the busbar 4 covers the battery assembly, and the busbar 4 is electrically connected to each of the poles 1211. During the assembly process of the transfer-type soft-pack battery of the present application, there is no need to bend the pole ear 23 of the soft-pack battery cell 2, and the pole 1211 on the protective shell 1 and the aluminum bar 41 on the busbar 4 can be directly connected, thereby improving the assembly efficiency of the battery module.

[0080] In some possible implementation schemes, the pole 1211 is arranged on one side of each battery module facing the busbar 4 , and a plurality of aluminum bars 41 are arranged on the busbar 4 , and each of the aluminum bars 41 is respectively attached and connected to a corresponding pole 1211 .

[0081] Each battery module is provided with only two poles 1211, one positive pole tab 23, and the other negative pole tab 23. Each battery module can be provided with at least two soft-pack cells 2, thereby facilitating the connection and assembly of the battery module and the busbar 4. When the busbar 4 is covered on the battery assembly, each aluminum bar 41 can be naturally connected to the poles 1211 of the corresponding battery module.

[0082] In some possible implementations, the pole 1211 includes a positive pole 1211 and a negative pole 1211 disposed on the protective shell 1, and each of the battery modules includes at least two soft-pack cells 2, and the positive pole tab 23 of each of the soft-pack cells 2 is electrically connected to the positive pole 1211, and the negative pole tab 23 of each of the soft-pack cells 2 is electrically connected to the negative pole 1211. The technical solution provided by the embodiment of the present disclosure reduces the connection between the battery cell and the aluminum plate, and reduces the workload.

[0083] In some possible embodiments, the protective shell 1 includes a main body and a cover body 12, the main body is provided with a plurality of cavities (at least two), the cover body 12 is connected to the main body, the positive electrode column 1211 and the negative electrode column 1211 are provided on the cover body 12, and each of the soft-pack battery cells 2 is respectively provided in a corresponding cavity.

[0084] The main body includes a plurality of shell components 11, each of which is arranged in sequence, each of which is provided with a cavity, and the cover body 12 is snapped on the outside of each of the shell components 11. The cover body 12 includes a top wall 121 and two groups of side walls 122 connected to the top wall 121, a pole 1211 is arranged on the top wall 121, and the two groups of side walls 122 are arranged at intervals, and the two groups of side walls 122 are located on both sides of the top wall 121 along the width direction. Each of the shell components 11 is clamped between the two groups of side walls 122. One of the shell components 11 and the side wall 122 is provided with a clamping protrusion 1121, and the other is provided with a clamping port 1222. When the cover body 12 is connected to the main body, the clamping protrusion 1121 is snapped on the clamping port 1222.

[0085] The two sets of side walls 122 form two notches on both sides (on both sides of the cover 12 along the length direction), and the thickness end faces of several shell components 11 are exposed in the notches. No side wall 122 is provided on one side of the notch, which can reduce the overall width of the battery module (or the length of the cover), and make the length dimension of the cover 12 consistent with the length dimension of the shell component 11, which is conducive to the battery module having a straight end face without protrusions or depressions.

[0086] In some possible implementations, the transfer-type soft-pack battery includes an electrical connector 3, which is located between the two groups of side walls 122, and the electrical connector 3 is respectively welded to the tabs 23 and the corresponding poles 1211 of each of the soft-pack cells 2, and each group of side walls 122 is provided with a clearance opening 1221 corresponding to the electrical connector 3. The setting of the clearance opening 1221 connects the internal space of the cover body 12, and facilitates the staff or automated machinery to extend into the interior of the cover body 12 through the clearance opening 1221 to connect the electrical connector 3 to the tabs 23 or the poles 1211 respectively. The clearance openings 1221 of the two side walls 122 are opposite to each other. The electrical connector 3 can be connected to the tab 23 by ultrasonic welding. By setting avoidance openings 1221 on the side walls 122 on both sides, the two clamping jaws of the ultrasonic welding equipment can respectively pass through the corresponding avoidance openings 1221 to cooperate and clamp the electrical connector 3 and the pole ear 23 on both sides to smoothly complete the welding and fixing of the electrical connector 3 and the pole ear 23.

[0087] Optionally, an isolation rib 123 is provided on the cover body 12, and the isolation rib 123 is connected to the top wall 121. The positive pole column 1211 and the negative pole column 1211 on the top wall 121 are located on both sides of the isolation rib 123. An electrical connector 3 is provided on both sides of the isolation rib 123, one electrical connector 3 is respectively connected to the positive pole tab 23 of each soft-pack battery cell 2 and the positive pole column 1211, and the other electrical connector 3 is respectively connected to the negative pole tab 23 of each soft-pack battery cell 2 and the negative pole column 1211. The provision of the isolation rib 123 separates the two electrical connectors 3, avoids short circuit between the two, and improves safety.

[0088] The isolation rib 123 divides the internal space of the cover 12 into two sub-cavities, and each sub-cavity is arranged with a pole ear 23, a pole 1211 and an electrical connector 3. Each side wall 122 is provided with a relief opening 1221 on both sides of the isolation rib 123, and the two relief openings 1221 are connected to the two sub-cavities respectively. The two relief openings 1221 on the two side walls 122 are arranged opposite to each other, so that the two electrical connectors 3 can be welded conveniently.

[0089] In some possible implementations, see Figure 2As shown, each of the shell components 11 is provided with a convex portion 11122 and a concave portion 11123 on both sides along the thickness direction, and the convex portion 11122 of one of the two adjacent shell components 11 is plugged into the concave portion 11123 of the other. Each battery cell module includes a set of shell components and a soft-pack battery cell arranged on the shell component. When a plurality of battery cell modules are arranged in sequence, the convex portion 11122 of one of the two adjacent battery cell modules is plugged into the concave portion 11123 of the other, so that in each battery cell module arranged in sequence, the two adjacent limit fittings are not misaligned in the plane where the main shell 1111 is located. Among them, the convex portion 11122 and the concave portion 11123 can be respectively arranged on both sides of the baffle 1112 along the width direction. At least on both sides along the width direction of the battery module, the baffle 1112 is provided with a convex portion 11122 and a concave portion 11123. Embodiment 5

[0090] See also Figures 1 to 7 As shown, the battery module provided in the embodiment of the present application can be a soft-pack battery module, including: a steel strip 6, a busbar 4, two end plates 8 and a plurality of battery modules. Each of the battery modules is arranged in sequence, and each of the battery modules includes a protective shell 1 and a soft-pack battery cell 2. The protective shell 1 has a cavity, and a pole 1211 is arranged on the surface of the protective shell 1. The soft-pack battery cell 2 is arranged in the cavity, and the soft-pack battery cell 2 is electrically connected to the pole 1211. The two end plates 8 are respectively located at the two ends of each of the battery modules along the length direction, and the steel strip 6 is sleeved on each of the battery modules and the end plates 8. The busbar 4 covers each of the battery modules, and a plurality of aluminum bars 41 are arranged on the busbar 4. Each of the aluminum bars 41 is electrically connected to the pole 1211 of the corresponding battery module to electrically connect each of the battery modules.

[0091] During the assembly of the battery module, the pole lug 23 of the soft-pack battery cell 2 does not need to be bent, and the pole post 1211 on the protective shell 1 and the aluminum bar 41 on the busbar 4 can be directly connected, thereby improving the assembly efficiency of the battery module.

[0092] In some possible implementations, the protective shell 1 has an upper end surface and a lower end surface, the pole 1211 part of the structure protrudes from the upper end surface, and the busbar 4 covers one side of the upper end surface of each battery module.

[0093] The pole 1211 is arranged on the upper end surface. When the busbar 4 is covered on the upper end surface, the aluminum bar 41 on the busbar 4 will smoothly fit and connect with the pole 1211 on the battery module, which is convenient for further welding through welding process.

[0094] In some possible implementations, the pole 1211 is in a sheet shape, the pole 1211 has a straight connecting surface exposed at the upper end surface, the aluminum bar 41 is attached to the straight connecting surface, and the aluminum bar 41 is welded to the straight connecting surface.

[0095] In some possible implementations, the busbar 4 includes a plate body, a plurality of hollow portions are provided on the plate body, a support bar is provided between two adjacent hollow portions, and when the busbar 4 covers each battery module, the pole 1211 of each battery module is respectively exposed to the corresponding hollow portion, the middle of the aluminum bar 41 is supported on the support bar, and both sides of the aluminum bar 41 respectively cover the hollow portions on both sides of the support bar and are connected to the pole 1211 exposed to the hollow portion. The hollow portion on the plate body is not a narrow groove, but a rectangle with a certain width, and the shape of the hollow portion matches the shape of the pole 1211.

[0096] In some possible implementations, the battery module has a positive pole 1211 and a negative pole 1211, which are sequentially arranged along the width direction of the protective shell 1, and each battery module is sequentially arranged along the thickness direction of the protective shell 1, and the busbar 4 has only two rows of hollow portions, and the positive pole 1211 and the negative pole 1211 of each battery module are respectively exposed to the corresponding hollow portions in the two rows of the hollow portions. Each battery module has only one positive pole tab 23 and one negative pole tab 23, and each battery module can have multiple soft-pack cells 2.

[0097] In some possible embodiments, each of the battery modules includes at least two soft-pack battery cells 2, the positive electrode tab 23 of each of the soft-pack battery cells 2 is connected to the positive electrode column 1211 of the battery module, and the negative electrode tab 23 of each of the soft-pack battery cells 2 is connected to the negative electrode column 1211 of the battery module.

[0098] In some possible implementations, the battery module includes a heat conducting plate 7, which is connected to the protective shell 1, and the heat conducting plate 7 is attached to the soft-pack battery cell 2, and the heat conducting plate 7 at least partially extends to the side of the protective shell 1 away from the pole 1211. That is, the heat conducting plate 7 extends to the lower end surface of the protective shell 1, so as to be directly attached to the surface of the water-cooled plate.

[0099] In some possible implementation schemes, an output seat 81 is provided on the end plate 8 , and the aluminum bar 41 at the end of the busbar 4 extends to the corresponding output seat 81 .

[0100] The present application also provides a battery pack, comprising: a box body and a soft-pack battery module. The box body has a cavity, the soft-pack battery module is located in the cavity, and the soft-pack battery module is fixed to the box body.

[0101] The battery pack includes a water cooling plate, which is arranged on the box body, and the heat conducting plates 7 of each battery module on the soft pack battery module are all attached to the water cooling plate.

[0102] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A soft pack battery module, characterized in that: include: A protective shell, wherein the protective shell has a cavity and a pole; A plurality of soft-pack battery cells are provided in the cavity, and the soft-pack battery cells have pole tabs, and the pole tabs are electrically connected to the poles.

2. The soft pack battery module according to claim 1, characterized in that: The protective shell comprises a main body and a cover body, the main body is provided with at least a portion of the cavity, the cover body is provided with the pole, and the cover body is connected to the main body; The soft-pack battery cell is arranged in the cavity of the main body, and the pole lug of the soft-pack battery cell extends out of the main body and is electrically connected to the pole.

3. The soft pack battery module according to claim 2, characterized in that: The cover body has a top wall and a side wall connected to the top wall; The pole is arranged on the top wall; The side wall is detachably connected to the main body.

4. The soft pack battery module according to claim 3, characterized in that: The pole is in a sheet shape, is parallel to the top wall, and protrudes from the outer surface of the top wall.

5. The soft pack battery module according to claim 4, characterized in that: The pole and the cover are formed into an integral piece by injection molding.

6. The soft pack battery module according to claim 5, characterized in that: The pole comprises a fixing sheet and an electrical connection sheet; The cross-sectional area of ​​the fixing sheet portion is greater than the cross-sectional area of ​​the electrical connection sheet portion; The fixing sheet portion is at least partially located inside the top wall, and the electrical connection sheet portion is at least partially protruding from the outer surface of the top wall.

7. The soft pack battery module according to claim 2, characterized in that: An electrical connector is included, and the electrical connector is located between the main body and the cover body, and the electrical connector is electrically connected to the pole lugs and corresponding poles of each of the battery cells.

8. The soft pack battery module according to claim 7, characterized in that: The electrical connector is in sheet shape; One side of the electrical connector is attached to the pole, and the electrical connector and the pole are fixed by welding.

9. The soft pack battery module according to claim 8, characterized in that: The other side of the electrical connector and the tabs of each battery cell are sequentially fitted in the thickness direction, and the electrical connector and the tabs are fixed by welding using an ultrasonic welding process.

10. A battery module, characterized in that: include: A plurality of soft pack battery modules as described in any one of claims 1 to 9; A busbar, wherein the busbar cover is disposed on each of the soft-pack battery modules, and a plurality of aluminum bars are arranged on the busbar, and each of the aluminum bars is electrically connected to a pole of a corresponding soft-pack battery module to electrically connect each of the soft-pack battery cells.

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