Lightweight energy storage battery pack and energy storage battery cluster

Abstract

The utility model relates to the technical field of energy storage, in particular to a lightweight energy storage battery pack and an energy storage battery cluster. A light-weight energy storage battery pack comprises a protection plate and light-weight energy storage modules, the protection plate is provided with wrapping edges which are tightly bundled on at least two mutually overlapped light-weight energy storage modules, and any two adjacent light-weight energy storage modules in the at least two light-weight energy storage modules are mutually connected in series; the lightweight energy storage module includes: a heat sink; the number of the battery cells is at least two, and the two battery cells are connected in series and abut against the two faces of the heat dissipation plate respectively; the first battery cell frame is mounted on one side of the heat dissipation plate; and the second battery cell frame is mounted on one side, far away from the first battery cell frame, of the heat dissipation plate. According to the scheme, the weight and the assembly difficulty can be reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a lightweight energy storage battery pack and an energy storage battery cluster. Background Art

[0002] At present, energy storage modules are mainly stacked with two cells sharing a middle frame structure, the cells are installed on both sides of the middle frame, the cell tabs are welded on the first bus, and then connected with the second bus to achieve series and parallel connection. For example, the Chinese invention with publication number CN109904378A (hereinafter referred to as Document 1) discloses a lithium battery energy storage module and a lithium battery energy storage module, wherein the lithium battery energy storage module is provided with a cell bracket specifically for installing cells and a busbar for electrically connecting each cell installed on the cell bracket.

[0003] However, the solution of document 1 still has the following disadvantages: heavy weight, much material, and difficult to assemble. Utility Model Content

[0004] The purpose of the utility model is to provide a lightweight energy storage battery pack and energy storage battery cluster to address the deficiencies of the prior art, aiming to achieve weight reduction and improve the convenience of assembly.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: a lightweight energy storage battery pack, including a protective plate and a lightweight energy storage module, the protective plate is provided with a binding edge tightly bound to at least two mutually superimposed lightweight energy storage modules, and any two adjacent ones of the at least two lightweight energy storage modules are connected in series with each other; the lightweight energy storage module includes: a heat dissipation plate; at least two battery cells are provided, and the two battery cells are connected in series and respectively abut against two sides of the heat dissipation plate; a first battery cell frame is installed on one side of the heat dissipation plate; and a second battery cell frame is installed on a side of the heat dissipation plate away from the first battery cell frame.

[0006] As a further solution of the utility model: a heat dissipation edge is provided on one side of the heat dissipation plate; the first battery cell frame is installed on the side of the heat dissipation plate adjacent to the heat dissipation edge on the same side; the heat dissipation edges corresponding to at least two of the lightweight energy storage modules are arranged flush on the same side of the lightweight energy storage battery pack.

[0007] As a further solution of the utility model: the heat dissipation edge includes a first heat dissipation warped edge and a second heat dissipation warped edge, and a first avoidance opening for accommodating the edge wrapping is spaced between the first heat dissipation warped edge and the second heat dissipation warped edge.

[0008] As a further solution of the utility model: the first battery frame and the second battery frame are respectively provided with storage limit grooves for accommodating the edge wrapping;

[0009] The heat dissipation edge includes a first limiting warped edge, a second limiting warped edge, and a main heat dissipation warped edge located between the first limiting warped edge and the second limiting warped edge, and a second avoidance opening matching the storage limiting groove is spaced between the main heat dissipation warped edge and the first limiting warped edge and / or the second limiting warped edge.

[0010] As a further solution of the utility model: the first battery cell frame is provided with a first insertion slot into which the heat sink is inserted, and the second battery cell frame is provided with a second insertion slot into which the heat sink is inserted;

[0011] The heat dissipation edge is provided with a first snap-in and a second snap-in, the first snap-in is provided on the first limiting warped edge, the second snap-in is provided on the second limiting warped edge, the outer wall of the first battery cell frame is provided with a first snap-in protrusion matching the first snap-in, and the outer wall of the second battery cell frame is also provided with a second snap-in protrusion matching the second snap-in.

[0012] As a further solution of the utility model: the first battery frame is provided with a first L-shaped through groove connected to the first insertion slot, and the first clamping protrusion is surrounded by the first insertion slot and the first L-shaped through groove; the second battery frame is provided with a second L-shaped through groove connected to the second insertion slot, and the second clamping protrusion is surrounded by the second insertion slot and the second L-shaped through groove.

[0013] As a further solution of the utility model: the two battery cells are respectively a first battery cell and a second battery cell; the first battery cell has a first positive electrode ear and a first negative electrode ear, and the second battery cell has a second positive electrode ear and a second negative electrode ear;

[0014] The lightweight energy storage module further includes: a first busbar connected to the first positive electrode ear; a second busbar connected to the second negative electrode ear; and a third busbar connected to the first negative electrode ear and the second positive electrode ear respectively;

[0015] The lightweight energy storage battery pack also includes: a fourth bus bar for connecting any two adjacent lightweight energy storage modules in series; and pads, two of which are provided and respectively placed on the two sides of the battery pack and the heat sink facing the same direction; wherein, two protective plates are provided and respectively placed on the two pads in corresponding matching manner, and the corresponding edges of the two protective plates are connected.

[0016] As a further solution of the utility model: the heat dissipation edge extends out of the first insertion slot and is bent toward the outer wall of the first battery frame adjacent to the first insertion slot.

[0017] As a further solution of the utility model: the heat dissipation edges are provided with two and are arranged on opposite sides of the heat dissipation plate respectively, the first slots are provided with two and are matched with the two heat dissipation edges one by one respectively, and the second slots are provided with two and are matched with the two heat dissipation edges one by one respectively.

[0018] An energy storage battery cluster comprises: an energy storage battery pack, which is formed by stacking at least two lightweight energy storage modules in series and / or in parallel; a battery rack, and a water cooling plate, which is installed on the battery rack; wherein at least two of the energy storage battery packs are placed side by side on the water cooling plate, and the heat dissipation edges corresponding to the energy storage battery packs one by one are abutted against the water cooling plate; the energy storage battery pack is any one of the aforementioned lightweight energy storage battery packs.

[0019] Beneficial effects of the utility model:

[0020] As for the prior art of Document 1, in addition to being heavy and requiring a lot of consumables, its energy storage module is not easy to assemble, and the energy storage module is not easy to assemble, and is also not strong enough. It is easy to fall apart during transportation and assembly, which poses a safety hazard. However, this solution:

[0021] First, by setting two battery racks in the lightweight energy storage module, namely the first battery rack and the second battery rack, compared with the prior art such as the solution of document 1 involving a whole battery rack (see document 1 for details), Figure 6 ), the middle section of the entire battery holder is removed to form two independently detachable battery holders, thereby reducing weight and materials, and reducing product manufacturing costs; and the two independently detachable battery holders are easier to assemble with the heat sink, further reducing manufacturing costs; that is, the first battery holder and the second battery holder can be directly installed on opposite sides of the heat sink, respectively, without the need to laboriously install the heat sink into the frame of the battery holder as in the battery holder of document 1;

[0022] Secondly, by providing a protective plate and providing an edge on the protective plate, a number of lightweight energy storage modules assembled into a lightweight energy storage battery pack are bundled tightly, which effectively improves the firmness and prevents the battery pack from falling apart. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of the lightweight energy storage module described in the present utility model.

[0024] Figure 2 This is another structural schematic diagram of the lightweight energy storage module of the utility model.

[0025] Figure 3 for Figure 1 The cross-sectional structure and partial enlarged schematic diagram.

[0026] Figure 4 for Figure 1 A structural decomposition and local enlargement schematic diagram of.

[0027] Figure 5 for Figure 1 Another structural decomposition and local enlargement schematic diagram of .

[0028] Figure 6 It is a schematic diagram of the structure of the lightweight energy storage battery pack of the utility model at two different viewing angles.

[0029] Figure 7 This is a schematic diagram of the structural decomposition of the lightweight energy storage battery pack described in the present invention.

[0030] Figure 8 It is a schematic diagram of the partial structural cross-section of the lightweight energy storage battery pack described in the present invention.

[0031] Fig. 9 This is a schematic diagram of an energy storage battery cluster in which the positive and negative ends of the battery packs corresponding to the upper and lower lightweight energy storage battery packs are arranged in the same direction. It can be seen that it is not easy to wire.

[0032] Fig.10 It is a structural schematic diagram of the energy storage battery cluster of the utility model, in which the positive terminals of the battery packs and the negative terminals of the battery packs corresponding to the upper and lower lightweight energy storage battery packs are distributed in opposite directions.

[0033] Reference numerals include:

[0034] 1—Lightweight energy storage module,

[0035] 11—first battery rack, 12—second battery rack, 13—heat dissipation plate, 14—battery cell, 15—first bus bar, 16—second bus bar, 17—third bus bar;

[0036] 111—first insertion slot, 112—first L-shaped through slot, 113—storage limit slot, 1111—first clamping protrusion,

[0037] 121—second insertion slot, 122—second L-shaped through slot, 1211—second clamping protrusion,

[0038] 131—heat dissipation edge,

[0039] 1311—first limit warping edge, 1312—second limit warping edge, 1313—main heat dissipation warping edge, 1314—first avoidance opening, 1315—second avoidance opening,

[0040] 1311a—First bayonet,

[0041] 1312a—Second bayonet,

[0042] 1313a—first heat dissipation edge, 1313b—second heat dissipation edge,

[0043] 141—first battery cell, 142—second battery cell;

[0044] 1411 - first positive ear, 1412 - first negative ear,

[0045] 1421—second positive electrode ear, 1422—second negative electrode ear;

[0046] 2—lightweight energy storage battery pack; 201—positive terminal of battery pack, 202—negative terminal of battery pack;

[0047] 21 - protective plate, 22 - pad, 23 - fourth bus bar, 24 - fifth bus bar,

[0048] 211—Edge;

[0049] 3—Energy storage battery cluster,

[0050] 31—Water cooling plate. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0052] like Figure 1 to Figure 10 As shown, in an embodiment of the utility model, a lightweight energy storage module 1 is provided, comprising: a heat sink 13, a battery cell 14, a first battery cell frame 11 and a second battery cell frame 12. Among them:

[0053] The heat dissipation plate 13 has a heat dissipation edge 131 on one side;

[0054] There are at least two battery cells 14, which are connected in series and respectively abut against two sides of the heat sink 13;

[0055] The first cell frame 11 is provided with a first insertion slot 111 into which the heat dissipation plate 13 is inserted, and is installed on a side of the heat dissipation plate 13 adjacent to the same side of the heat dissipation edge 131;

[0056] The second cell frame 12 is installed on a side of the heat sink 13 away from the first cell frame 11. Optionally, both the first cell frame 11 and the second cell frame 12 are insulating frames, such as plastic insulating frames.

[0057] In this solution, two battery cell racks 14 are provided, namely, a first battery cell rack 11 and a second battery cell rack 12, compared with the prior art such as the solution of document 1 involving a whole battery cell rack (see document 1 for details). Figure 6), the middle section of the entire battery holder is removed to reduce weight and material, reduce costs, and set a first slot 111 for inserting the heat sink 13 in the first battery holder 11, so that the heat sink 13 and the first battery holder 11 are easy to assemble, further reducing the manufacturing cost. Figure 6 ), there is also the following problem: it is not easy to install the heat sink 13. If the heat sink 13 is installed, only one slot can be set on the side of the battery holder, otherwise the heat dissipation edge 131 cannot be installed in the frame of the battery holder. In this solution, two battery cell frames 14 are provided, that is, an entire battery cell frame is split into a first battery cell frame 11 and a second battery cell frame 12, so that the first battery cell frame 11 and the second battery cell frame 12 can be respectively inserted and installed on opposite sides of the heat sink 13, without having to insert the heat sink 13 from the insertion slot on the side of the entire battery cell frame to install the heat sink 13 in the frame of the entire battery cell frame, which greatly simplifies the installation process of the heat sink 13 and the construction difficulty of the first insertion slot 111 on the first battery cell frame 11, and can also provide heat dissipation edges 131 on both sides of the heat sink 13, that is, there are two heat dissipation edges 131, thereby achieving heat dissipation edges 131 on both sides of the lightweight energy storage battery pack 2, so as to be more conducive to realizing different oriented installation methods between the water cooling plate 31, so as to improve the applicability of the lightweight energy storage battery pack 2.

[0058] In one embodiment, Figure 3~Figure 5 As shown, the second cell frame 12 is provided with a second insertion slot 121 into which the heat sink 13 is inserted. Specifically, opposite sides of the heat sink 13 are inserted into the first insertion slot 111 and the second insertion slot 121, respectively.

[0059] In another embodiment, Figure 4 As shown, the heat dissipation edge 131 extends out of the first insertion slot 111 , and is bent and tilted toward the outer wall of the first battery frame 11 adjacent to the first insertion slot 111 .

[0060] In yet another embodiment, Figure 4 and Figure 5 As shown, the heat dissipation edge 131 is provided with a first bayonet 1311 a , and the outer wall of the first battery frame 11 is provided with a first bayonet protrusion 1111 matching the first bayonet 1311 a .

[0061] In yet another embodiment, Figure 4 and Figure 5 As shown, the heat dissipation edge 131 is further provided with a second bayonet 1312a, and the outer wall of the second battery frame 12 is further provided with a second bayonet 1211 matching the second bayonet 1312a.

[0062] In another embodiment, if Figure 1~Figure 5 As shown, the heat dissipation edge 131 includes a first limiting warped edge 1311, a second limiting warped edge 1312 and a main heat dissipation warped edge 1313 located between the first limiting warped edge 1311 and the second limiting warped edge 1312, the first clip 1311a is arranged on the first limiting warped edge 1311, and the second clip 1312a is arranged on the second limiting warped edge 1312.

[0063] In another embodiment, the main heat dissipation warped edge 1313 includes a first heat dissipation warped edge 1313a and a second heat dissipation warped edge 1313b.

[0064] In another embodiment, two heat dissipation edges 131 are provided and are arranged on opposite sides of the heat dissipation plate 13, two first slots 111 are provided and respectively match the two heat dissipation edges 131 one by one, and two second slots 121 are provided and respectively match the two heat dissipation edges 131 one by one.

[0065] In another embodiment, if Figure 6~Figure 8 As shown, a lightweight energy storage battery pack 2 includes at least two energy storage modules 1 connected in series and / or in parallel, and the energy storage module 1 is any of the lightweight energy storage modules 1 described above. Specifically, after the lightweight energy storage module 1 is reduced in weight, the load-bearing burden of the protective plate 21 and the pad 22 of the lightweight energy storage battery pack 2 can be effectively reduced for assembly into the lightweight energy storage battery pack 2, making the lightweight energy storage battery pack 2 more secure and less likely to loosen and fall off, and also reducing transportation energy consumption, which is more cost-effective.

[0066] Another embodiment, such as Fig.10 As shown, an energy storage battery cluster 3 includes: an energy storage battery pack 2, a battery rack and a water cooling plate 31. The energy storage battery pack 2 is formed by stacking at least two lightweight energy storage modules 1 in series and / or in parallel; the water cooling plate 31 is detachable from the battery rack; at least two of the energy storage battery packs 2 are placed side by side on the water cooling plate 31, and the heat dissipation edges 131 corresponding to the energy storage battery packs 2 are pressed against the water cooling plate 31; the energy storage battery pack 2 is the lightweight energy storage battery pack 2 described above.

[0067] A lightweight energy storage battery pack 2, such as Figure 1 to Figure 10 As shown, it includes a protective plate 21 and a lightweight energy storage module 1, wherein the protective plate 21 is provided with a binding edge 211 tightly bound to at least two mutually superimposed lightweight energy storage modules 1, and any two adjacent ones of at least two lightweight energy storage modules 1 are connected in series with each other; the lightweight energy storage module 1 includes: a heat sink 13, a battery cell 14, a first battery cell frame 11 and a second battery cell frame 12; wherein:

[0068] There are at least two battery cells 14, which are connected in series and respectively abut against two sides of the heat sink 13;

[0069] The first battery cell frame 11 is installed on one side of the heat dissipation plate 13;

[0070] The second cell frame 12 is installed on the side of the heat sink 13 away from the first cell frame 11. Specifically, after the lightweight energy storage module 1 is reduced in weight, it can effectively reduce the load-bearing burden of the protective plate 21 and the pad 22 of the lightweight energy storage battery pack 2 when assembled into a lightweight energy storage battery pack 2, making the lightweight energy storage battery pack 2 more secure and less likely to loosen and fall off, and also reducing transportation energy consumption, making it more cost-effective. In the lightweight energy storage modules 1 constituting the lightweight energy storage battery pack 2, the two outer lightweight energy storage modules 1 respectively lead out the battery pack positive terminal 201 and the battery pack negative terminal 202, and a fifth bus 24 is also provided to facilitate the connection of the battery pack positive terminal 201 and the battery pack negative terminal 202 with the two lightweight energy storage modules 1 respectively.

[0071] As for the prior art of document 1, in addition to being heavy and requiring a lot of consumables, its energy storage module 1 is not easy to assemble, and the energy storage module is not easy to assemble, and is also not strong enough, and is easy to fall apart during transportation and assembly, posing a safety hazard.

[0072] First, by setting two battery cell racks 14 in the lightweight energy storage module 1, namely the first battery cell rack 11 and the second battery cell rack 12, compared with the prior art such as the solution of document 1 involving a whole battery cell rack (see document 1 for details), Figure 6 ), the middle section of the entire battery holder is removed to form two independently detachable battery holders 14, thereby reducing weight and material, and reducing product manufacturing costs; and the two independently detachable battery holders 14 are easier to assemble with the heat sink 13, further reducing manufacturing costs; that is, the first battery holder 11 and the second battery holder 12 are directly mounted on opposite sides of the heat sink 13, respectively, without the need to work hard to install the heat sink 13 into the frame of the battery holder as in the battery holder of the document 1;

[0073] Secondly, by providing a protective plate 21 and providing an edge 211 on the protective plate 21, a plurality of lightweight energy storage modules 1 assembled into a lightweight energy storage battery pack 2 are bundled tightly, thereby effectively improving the firmness and preventing the battery pack from falling apart.

[0074] In one embodiment, Figure 1~Figure 5 As shown, a heat dissipation edge 131 is provided on one side of the heat dissipation plate 13; the first battery cell frame 11 is installed on a side of the heat dissipation plate 13 adjacent to the heat dissipation edge 131;

[0075] like Figure 6 and Figure 7 As shown, the heat dissipation edges 131 corresponding to at least two of the lightweight energy storage modules 1 are arranged flush on the same side of the lightweight energy storage battery pack 2. Specifically, by providing the heat dissipation edge 131 that can contact the cold water plate, it is easier to dissipate heat from the heat dissipation plate 13. When assembled into a lightweight energy storage battery pack 2, the heat dissipation edges 131 corresponding to the several lightweight energy storage modules 1 are arranged flush on both sides of the lightweight energy storage battery pack 2, so that the several corresponding heat dissipation edges 131 can all be contacted with a cold water plate to achieve heat dissipation, which improves the heat dissipation effect and greatly simplifies the heat dissipation cost.

[0076] In another embodiment, Figure 1~Figure 5 As shown, the heat dissipation edge 131 includes a first heat dissipation warped edge 1313a and a second heat dissipation warped edge 1313b, and a first avoidance opening 1314 for accommodating the edge wrapping 211 is provided between the first heat dissipation warped edge 1313a and the second heat dissipation warped edge 1313b. Specifically, the first avoidance opening 1314 is provided to prevent the edge wrapping 211 on the protective plate 21 from covering the heat dissipation edge 131 of the heat dissipation plate 13, thereby avoiding affecting the contact between the heat dissipation edge 131 and the cold water plate, thereby ensuring the heat dissipation effect between the heat dissipation edge 131 and the cold water plate. In addition, the overall firmness of the battery pack can be improved without affecting the heat dissipation effect.

[0077] In yet another embodiment, Figure 1~Figure 5 As shown, the first battery frame 11 and the second battery frame 12 are respectively provided with a storage limit groove 113 for accommodating the edge wrapping 211;

[0078] The heat dissipation edge 131 includes a first limiting warped edge 1311, a second limiting warped edge 1312, and a main heat dissipation warped edge 1313 located between the first limiting warped edge 1311 and the second limiting warped edge 1312, and a second avoidance opening 1315 matching the storage limiting groove 113 is provided between the main heat dissipation warped edge 1313 and the first limiting warped edge 1311 and / or the second limiting warped edge 1312. Specifically, the main heat dissipation warped edge 1313 includes a first heat dissipation warped edge 1313a and a second heat dissipation warped edge 1313b. The second avoidance opening 1315 is provided to prevent the edging 211 on the protective plate 21 from covering the heat dissipation edge 131 of the heat dissipation plate 13, thereby avoiding affecting the contact between the heat dissipation edge 131 and the cold water plate, and further ensuring the heat dissipation effect between the heat dissipation edge 131 and the cold water plate. The storage limit groove 113 can prevent the edge 211 from moving, further improving the tightening effect and firmness, and can also further accommodate the edge 211 to prevent the edge 211 from being higher than or protruding from the heat dissipation edge 131, thereby further avoiding affecting the contact between the heat dissipation edge 131 and the cold water plate.

[0079] In another embodiment, the first cell frame 11 is provided with a first insertion slot 111 into which the heat dissipation plate 13 is inserted, and the second cell frame 12 is provided with a second insertion slot 121 into which the heat dissipation plate 13 is inserted;

[0080] The heat dissipation edge 131 is provided with a first snap-in 1311a and a second snap-in 1312a, the first snap-in 1311a is provided on the first limiting warped edge 1311, the second snap-in 1312a is provided on the second limiting warped edge 1312, the outer wall of the first battery frame 11 is provided with a first snap-in 1111 matching the first snap-in 1311a, the outer wall of the second battery frame 12 is also provided with a second snap-in 1211 matching the second snap-in 1312a.

[0081] In another embodiment, reference Figure 3~Figure 5 The first battery frame 11 is provided with a first L-shaped slot 112 connected to the first insertion slot 111, and the first latching protrusion 1111 is surrounded by the first insertion slot 111 and the first L-shaped slot 112; the second battery frame 12 is provided with a second L-shaped slot 122 connected to the second insertion slot 121, and the second latching protrusion 1211 is surrounded by the second insertion slot 121 and the second L-shaped slot 122. Specifically, the first latching protrusion 1111 is integrally formed on the first battery frame 11, and is surrounded by the first insertion slot 111 and the first L-shaped slot 112, so that the first latching protrusion 1111 is cut off on three sides, and then the first latching protrusion 1111 has a certain elasticity, so as to have a certain elastic pre-tightening force, so as to be easier to be engaged with the first limit warping edge 1311 to prevent falling off. Similarly, the second latching protrusion 1211 is integrally formed on the first battery frame 11, and through the second insertion slit 121 and the second L-shaped through groove 122, the second latching protrusion 1211 has a certain elastic pre-tightening force, which is convenient for latching connection with the second limiting warping edge 1312 to prevent falling off.

[0082] In one embodiment, reference Figure 1~Figure 5 The two battery cells 14 are respectively a first battery cell 141 and a second battery cell 142 ; the first battery cell 141 has a first positive electrode ear 1411 and a first negative electrode ear 1412 , and the second battery cell 142 has a second positive electrode ear 1421 and a second negative electrode ear 1422 ; the lightweight energy storage module 1 also includes: a first bus bar 15 , a second bus bar 16 and a third bus bar 17 .

[0083] A first bus bar 15 connected to the first positive electrode tab 1411;

[0084] A second bus bar 16 connected to the second negative electrode ear 1422;

[0085] A third bus bar 17 is connected to the first negative electrode tab 1412 and the second positive electrode tab 1421 respectively;

[0086] The lightweight energy storage battery pack 2 further includes: a fourth bus bar 23 and a pad 22 .

[0087] A fourth bus bar 23, used for connecting any two adjacent lightweight energy storage modules 1 in series;

[0088] There are two pads 22, which are placed on the same sides of the battery pack and the heat sink 13; wherein, there are two protective plates 21, which are placed on the two pads 22 in a corresponding matching manner, and the corresponding edges 211 of the two protective plates 21 are connected. Specifically, the pads 22 will not cover the heat sink edge 131. The corresponding edges 211 of the two protective plates 21 are welded and fixed to each other.

[0089] In another embodiment, if Figure 4 As shown, the heat dissipation edge 131 extends out of the first insertion slot 111 , and is bent and tilted toward the outer wall of the first battery frame 11 adjacent to the first insertion slot 111 .

[0090] In another embodiment, two heat dissipation edges 131 are provided and are arranged on opposite sides of the heat dissipation plate 13, two first slots 111 are provided and respectively match the two heat dissipation edges 131 one by one, and two second slots 121 are provided and respectively match the two heat dissipation edges 131 one by one.

[0091] An energy storage battery cluster 3, such as Figure 1 to Figure 10 As shown, it includes a battery rack, a water-cooling plate 31 installed on the battery rack, and a lightweight energy storage battery pack 2 placed on the water-cooling plate 31. The lightweight energy storage battery pack 2 is composed of at least two energy storage modules 1 stacked in series and / or in parallel; the energy storage module 1 includes: a heat sink 13, a battery cell 14, a first battery cell rack 11, and a second battery cell rack 12. Among them:

[0092] The heat dissipation plate 13 is provided with heat dissipation edges 131 on two opposite sides, and the heat dissipation edge 131 on at least one side abuts against the water cooling plate 31;

[0093] There are at least two battery cells 14, which are connected in series and respectively abut against two sides of the heat sink 13;

[0094] The first battery frame 11 is installed on the side of the heat dissipation plate 13 adjacent to the heat dissipation edge 131, and has first insertion slots 111 inserted by the heat dissipation plate 13 and respectively matched with the heat dissipation edge 131 on both sides;

[0095] The second cell frame 12 is installed on a side of the heat dissipation plate 13 away from the first cell frame 11 .

[0096] In this solution, two battery cell racks 14 are provided, namely, a first battery cell rack 11 and a second battery cell rack 12, compared with the prior art such as the solution of document 1 involving a whole battery cell rack (see document 1 for details). Figure 6 ) For the first battery frame 11, the middle section of the entire battery support is removed to achieve weight reduction and material reduction, reduce costs, and set the first slots 111 for the heat sink 13 to be inserted on both sides of the first battery frame 11, so that the heat sink 13 and the first battery frame 11 are easy to assemble, further reducing the manufacturing cost. After the energy storage module 1 is reduced in weight, it can effectively reduce the load of the protective plate 21 and the pad 22 of the lightweight energy storage battery pack 2 for assembly into a lightweight energy storage battery pack 2, making the lightweight energy storage battery pack 2 more secure and less likely to loosen and fall off. For the energy storage battery cluster 3, it effectively reduces the load of the water cooling plate 31, also reduces transportation energy consumption, and is more cost-effective. In addition, the heat dissipation edges 131 on both sides of the heat dissipation plate 13 can be pre-pressed and bent, and then inserted into the first insertion slit 111 of the first battery frame 11, so that the heat dissipation edges 131 are arranged on both sides of the lightweight energy storage battery pack 2. Therefore, when assembling the energy storage battery cluster 3, the lightweight energy storage battery pack 2 can be turned over so that the heat dissipation edge 131 on the side not used for the lower layer faces downward and contacts the water cooling plate 31, so that the arrangement directions of the positive terminal 201 and the negative terminal 202 of the lightweight energy storage battery pack 2 between the upper and lower layers are opposite, which is beneficial to the serial wiring of the upper and lower lightweight energy storage battery packs 2.

[0097] In detail, the solution of document 1 involves a whole battery cell bracket (see document 1 for details) Figure 6 ), there are also the following problems: it is not easy to install the heat sink 13. If you insist on installing the heat sink 13, you must set a slot on the side of the battery holder, otherwise the heat dissipation edge 131 cannot be installed in the frame of the battery holder. Moreover, since it is difficult to first install the heat sink 13 into the frame of the battery holder and then bend the heat dissipation edge 131, the heat sink 13 needs to be pre-pressed and bent at the time of incoming materials during the assembly process, and then inserted into the frame of the battery holder. In order to ensure that the heat sink 13 can be inserted into the frame of the battery holder through the slot, the heat sink 13 can only bend the heat dissipation edge 131 on one side, and the heat dissipation edge 131 cannot be bent on the other side, otherwise it cannot pass through the slot. Therefore, the module corresponding to the lightweight energy storage battery pack 2 can arrange the heat dissipation edge 131 on one side. When assembled into a battery cluster, such as Fig. 9As shown, if the lightweight energy storage battery pack 2 has a heat dissipation edge 131 on only one side, the arrangement directions of the battery pack positive terminal 201 and the battery pack negative terminal 202 corresponding to the lightweight energy storage battery pack 2 between the upper and lower layers are the same, and in order to ensure the series connection between the upper and lower layers, winding is inevitably required, which is not conducive to the arrangement of the series wiring body.

[0098] In this solution, two battery cell frames 14 are provided, that is, a whole battery cell frame is split into a first battery cell frame 11 and a second battery cell frame 12, so that the first battery cell frame 11 and the second battery cell frame 12 can be respectively inserted and installed on opposite sides of the heat sink 13, without having to insert the heat sink 13 from the insertion slot on the side of the whole battery cell frame to install the heat sink 13 in the frame of the whole battery cell frame, which greatly simplifies the installation process of the heat sink 13 and the construction difficulty of the first insertion slot 111 on the first battery cell frame 11;

[0099] In addition, it is also possible to arrange heat dissipation edges 131 on both sides of the heat dissipation plate 13, and then arrange heat dissipation edges 131 on both sides of the lightweight energy storage battery pack 2. Specifically, the edges on both sides of the heat dissipation plate 13 can be bent into heat dissipation edges 131 respectively, and then the side of the heat dissipation plate 13 adjacent to the heat dissipation edge 131 on the same side is inserted into the first insertion slot 111 of the first battery cell 141 bracket, so that the heat dissipation edges 131 can be arranged on both sides of the heat dissipation plate 13, and then the heat dissipation edges 131 can be arranged on both sides of the lightweight energy storage battery pack 2. Furthermore, if Fig.10 As shown, when assembling the energy storage battery cluster 3, the lightweight energy storage battery pack 2 of another layer can be turned over so that the upper and lower lightweight energy storage battery packs 2 are arranged in opposite directions, so that the battery pack positive terminals 201 and the battery pack negative terminals 202 corresponding to the upper and lower lightweight energy storage battery packs 2 are arranged in opposite directions, so as to be more conducive to the connection and wiring of the series wires, and the wiring is more beautiful. At the same time, it also avoids the problem of different internal resistances between wires due to different lengths of wires, resulting in safety hazards such as wire scalding, damage to the insulation layer, and short circuit.

[0100] In one embodiment, Fig.10As shown, at least two water-cooling plates 31 are provided and distributed in upper and lower layers, and any two adjacent layers of at least two water-cooling plates 31 are respectively matched with at least one lightweight energy storage battery pack 2, and the lightweight energy storage battery pack 2 has a battery pack positive terminal 201 and a battery pack negative terminal 202, and any two adjacent layers of the lightweight energy storage battery pack 2 are aligned and distributed up and down, and the arrangement directions of the corresponding battery pack positive terminal 201 and the battery pack negative terminal 202 are opposite. Specifically, for the convenience of wiring, it is necessary to flip the upper layer of lightweight energy storage battery pack 2 up and down, so that the upper layer of lightweight energy storage battery pack 2 is arranged opposite to the lower layer in the up and down direction, and then the battery pack positive terminal 201 and the battery pack negative terminal 202 corresponding to the upper and lower lightweight energy storage battery packs 2 are arranged oppositely, so as to be more conducive to the connection wiring of the series wires, the wiring is more beautiful, and at the same time, it also avoids the problem of different internal resistance between wires due to different lengths of wires, resulting in safety hazards such as wire scalding, insulation layer damage and short circuit.

[0101] In another embodiment, Fig.10 As shown, the arrangement directions of the battery pack positive terminals 201 and the battery pack negative terminals 202 respectively corresponding to any two of the lightweight energy storage battery packs 2 placed on the same water cooling plate 31 are the same. Specifically, it is further beneficial to wiring.

[0102] In yet another embodiment, Figure 6 and Figure 7 As shown, the heat dissipation edges 131 corresponding to the energy storage modules 1 constituting the lightweight energy storage battery pack 2 are all arranged flush on the same side of the lightweight energy storage battery pack 2. Specifically, it is ensured that all heat dissipation edges 131 on the same side of the lightweight energy storage battery pack 2 can contact the same water cooling plate 31 to achieve heat dissipation.

[0103] In yet another embodiment, Figure 4 As shown, the second cell frame 12 is provided with a second insertion slot 121 into which the heat dissipation plate 13 is inserted; the heat dissipation edge 131 extends out of the first insertion slot 111, and is bent and tilted toward the outer wall of the first cell frame 11 adjacent to the first insertion slot 111. Specifically, similarly, the heat dissipation edge 131 extends out of the second insertion slot 121, and is bent toward the outer wall of the second cell frame 12 adjacent to the second insertion slot 121.

[0104] In another embodiment, if Figure 4 and Figure 5 As shown, the heat dissipation edge 131 is provided with a first bayonet 1311a, and the outer wall of the first battery frame 11 is provided with a first bayonet 1111 matching the first bayonet 1311a;

[0105] The heat dissipation edge 131 is further provided with a second bayonet 1312 a , and the outer wall of the second battery frame 12 is further provided with a second bayonet protrusion 1211 matching the second bayonet 1312 a .

[0106] In another embodiment, if Figure 1~Figure 5 As shown, the heat dissipation edge 131 includes a first limiting warped edge 1311, a second limiting warped edge 1312 and a main heat dissipation warped edge 1313 located between the first limiting warped edge 1311 and the second limiting warped edge 1312, the first clip 1311a is arranged on the first limiting warped edge 1311, and the second clip 1312a is arranged on the second limiting warped edge 1312.

[0107] In another embodiment, if Figure 3~Figure 5 As shown, the first battery frame 11 is provided with a first L-shaped through groove 112 communicating with the first insertion slot 111, and the first clamping protrusion 1111 is surrounded by the first insertion slot 111 and the first L-shaped through groove 112;

[0108] The second cell frame 12 is provided with a second L-shaped through slot 122 communicating with the second insertion slot 121 , and the second latching protrusion 1211 is surrounded by the second insertion slot 121 and the second L-shaped through slot 122 .

[0109] In another embodiment, if Figure 1~Figure 5 As shown, the main heat dissipation warped edge 1313 includes a first heat dissipation warped edge 1313a and a second heat dissipation warped edge 1313b.

[0110] Another embodiment, such as Figure 1~Figure 5 As shown, the lightweight energy storage battery pack 2 also includes a protective plate 21, and the protective plate 21 is provided with a edging 211 that is tightly bound to at least two superimposed lightweight energy storage modules 1, and a first avoidance opening 1314 for accommodating the edging 211 is spaced between the first heat dissipation warped edge 1313a and the second heat dissipation warped edge 1313b.

[0111] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightweight energy storage battery pack, characterized in that: It comprises a protective plate (21) and a lightweight energy storage module (1), wherein the protective plate (21) is provided with a binding edge (211) which is tightly bound to at least two mutually superimposed lightweight energy storage modules (1), and any two adjacent ones of the at least two lightweight energy storage modules (1) are mutually connected in series; The lightweight energy storage module (1) comprises: Heat dissipation plate (13); At least two battery cells (14) are provided, and the two battery cells (14) are connected in series and respectively abut against two surfaces of the heat dissipation plate (13); A first battery cell frame (11) is mounted on one side of the heat dissipation plate (13); and The second cell frame (12) is mounted on a side of the heat dissipation plate (13) away from the first cell frame (11).

2. The lightweight energy storage battery pack according to claim 1, characterized in that: A heat dissipation edge (131) is provided on one side of the heat dissipation plate (13); the first battery cell frame (11) is installed on a side of the heat dissipation plate (13) adjacent to the heat dissipation edge (131); The heat dissipation edges (131) respectively corresponding to at least two of the lightweight energy storage modules (1) are arranged flush on the same side of the lightweight energy storage battery pack (2).

3. The lightweight energy storage battery pack according to claim 2, characterized in that: The heat dissipation edge (131) comprises a first heat dissipation warped edge (1313a) and a second heat dissipation warped edge (1313b), and a first avoidance opening (1314) for accommodating the edge wrapping (211) is spaced between the first heat dissipation warped edge (1313a) and the second heat dissipation warped edge (1313b).

4. The lightweight energy storage battery pack according to claim 2, characterized in that: The first battery cell frame (11) and the second battery cell frame (12) are respectively provided with a corresponding storage limit groove (113) for accommodating the edge wrapping (211); The heat dissipation edge (131) comprises a first limiting warped edge (1311), a second limiting warped edge (1312), and a main heat dissipation warped edge (1313) located between the first limiting warped edge (1311) and the second limiting warped edge (1312), and a second avoidance opening (1315) matching the storage limiting groove (113) is provided between the main heat dissipation warped edge (1313) and the first limiting warped edge (1311) and / or the second limiting warped edge (1312).

5. The lightweight energy storage battery pack according to claim 4, characterized in that: The first battery cell frame (11) is provided with a first insertion slot (111) into which the heat dissipation plate (13) is inserted, and the second battery cell frame (12) is provided with a second insertion slot (121) into which the heat dissipation plate (13) is inserted; The heat dissipation edge (131) is provided with a first snap-in (1311a) and a second snap-in (1312a); the first snap-in (1311a) is provided on the first position-limiting warped edge (1311); the second snap-in (1312a) is provided on the second position-limiting warped edge (1312); the outer wall of the first battery frame (11) is provided with a first snap-in protrusion (1111) matching the first snap-in (1311a); and the outer wall of the second battery frame (12) is also provided with a second snap-in protrusion (1211) matching the second snap-in (1312a).

6. The lightweight energy storage battery pack according to claim 5, characterized in that: The first cell frame (11) is provided with a first L-shaped through groove (112) connected to the first insertion slit (111), and the first latching protrusion (1111) is surrounded by the first insertion slit (111) and the first L-shaped through groove (112); The second battery cell frame (12) is provided with a second L-shaped through groove (122) communicating with the second insertion slit (121), and the second latching protrusion (1211) is surrounded by the second insertion slit (121) and the second L-shaped through groove (122).

7. The lightweight energy storage battery pack according to claim 1, characterized in that: The two battery cells (14) are respectively a first battery cell (141) and a second battery cell (142); the first battery cell (141) has a first positive electrode ear (1411) and a first negative electrode ear (1412), and the second battery cell (142) has a second positive electrode ear (1421) and a second negative electrode ear (1422); The lightweight energy storage module (1) further comprises: A first bus bar (15) connected to the first positive electrode tab (1411); A second bus bar (16) connected to the second negative electrode tab (1422); and a third busbar (17), connected to the first negative electrode lug (1412) and the second positive electrode lug (1421), respectively; The lightweight energy storage battery pack (2) also includes: a fourth bus bar (23) for connecting any two adjacent lightweight energy storage modules (1) in series; and Two pads (22) are provided and are respectively placed on two sides of the battery pack and the heat sink (13) facing the same direction; There are two protective plates (21), which are respectively placed on the two pads (22) with corresponding matching pads, and the corresponding edges (211) of the two protective plates (21) are connected.

8. The lightweight energy storage battery pack according to claim 5, characterized in that: The heat dissipation edge (131) extends out of the first insertion slot (111) and is bent toward the outer wall of the first battery frame (11) adjacent to the first insertion slot (111).

9. The lightweight energy storage battery pack according to claim 5, characterized in that: Two heat dissipation edges (131) are provided and are respectively arranged on two opposite sides of the heat dissipation plate (13); two first insertion slots (111) are provided and are respectively matched with the two heat dissipation edges (131) in a one-to-one correspondence; and two second insertion slots (121) are provided and are respectively matched with the two heat dissipation edges (131) in a one-to-one correspondence.

10. An energy storage battery cluster, characterized in that: include: An energy storage battery pack (2) is formed by stacking at least two lightweight energy storage modules (1) in series and / or in parallel; Battery rack, and A water cooling plate (31), mounted on the battery rack; Wherein, at least two of the energy storage battery packs (2) are placed side by side on the water cooling plate (31), and the heat dissipation edges (131) corresponding one to each of the energy storage battery packs (2) are in contact with the water cooling plate (31); The energy storage battery pack (2) is a lightweight energy storage battery pack (2) as claimed in any one of claims 2 to 9.

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