Battery module and battery pack
By designing cross-set cooling channels in the battery module to increase the cooling area of the battery cell, the risk of thermal runaway caused by the increase in the charging rate of lithium batteries is solved, and the safety of the battery pack is improved.
Patent Information
- Application Number
- CN202421845930.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-31
AI Technical Summary
Lithium batteries have a risk of thermal runaway due to increasing the charging rate. The prior art of adding liquid-cooled plates to the bottom of the battery module has limited effect and it is difficult to effectively control the surface temperature of the battery cell.
By adding U-side cold plates, U-end cold plates and back-shaped flow channel top plates to the battery module, a cross-set cooling flow channel is formed, which significantly increases the cooling area of the battery cell and enhances the heat dissipation ability.
It effectively improves the heat dissipation ability of the battery module, reduces the risk of thermal runaway caused by the increase in charging rate of lithium batteries, and improves the safety of the battery pack.
Smart Images
Figure CN222883649U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of new energy, and in particular to a battery module and a battery pack. Background Art
[0002] With the development of the new energy industry, more and more vehicles are beginning to use lithium batteries as a power source. Compared with traditional fuel systems, lithium batteries are popular among users due to their advantages such as green energy saving, smoothness and reliability. However, lithium batteries also have some defects, such as long charging time.
[0003] In order to shorten the charging time of lithium batteries, industry technicians continue to increase the charging rate of lithium batteries. However, this method will cause the surface temperature of the battery cells to rise sharply. If not controlled in time, thermal runaway will spread and eventually cause fire accidents, seriously affecting the safe use of lithium batteries.
[0004] At present, most of the design solutions in the industry are to add a liquid cooling plate at the bottom of the battery module. Since a single square battery cell has six sides, each side will accumulate a certain amount of heat during operation. Simply cooling at the bottom of the battery module will have a very limited cooling effect. Utility Model Content
[0005] The purpose of the utility model is to provide a battery module and a battery pack, which can solve the problem in the prior art that lithium batteries have a risk of thermal runaway due to increasing the charging rate, and improve the heat dissipation capacity of the battery module by increasing the cooling area of the battery module, thereby improving the safety of the battery pack.
[0006] The embodiment of the utility model is achieved as follows:
[0007] The first aspect of the embodiment of the utility model provides a battery module, including a plurality of cells arranged in sequence, each of which includes a cell body, a U-shaped side cold plate, a U-shaped end cold plate and a U-shaped flow channel top plate, the U-shaped side cold plate and the U-shaped end cold plate are cross-arranged, the inner side surface of the U-shaped side cold plate is respectively fitted with the bottom surface of the cell body and the two side surfaces of the cell body, the inner side surface of the U-shaped end cold plate is respectively fitted with the bottom surface of the U-shaped side cold plate and the two end surfaces of the cell body, and the U-shaped flow channel top plate is fixedly arranged on the top surface of the cell body and communicated with the U-shaped side cold plate and the U-shaped end cold plate to jointly form a cooling flow channel for the circulation of coolant. The battery module can solve the problem of thermal runaway risk of lithium batteries due to the increase of charging rate in the prior art, and improve the heat dissipation capacity of the battery module by increasing the cooling area of the battery module, thereby improving the safety of the battery pack.
[0008] As an implementation method, the U-shaped side cold plate and the U-shaped end cold plate are each provided with a plurality of branch channels arranged in parallel and at intervals, a turning groove is provided in the top plate of the U-shaped channel, and two adjacent branch channels are connected to each other through the turning groove.
[0009] As an implementation method, it also includes two collecting tubes and multiple connecting tubes, two openings are set on the U-shaped flow channel top plate, and the two collecting tubes are connected with the openings on the same side of the U-shaped flow channel top plate of each battery cell through the connecting tubes.
[0010] As an implementation method, it also includes an X-shaped pressure plate, which is arranged along the arrangement direction of the multiple battery cells. The inner side surface of the X-shaped pressure plate is respectively fitted with the top surface of the multiple battery cells and the end surfaces of two battery cells located at opposite ends of the multiple battery cells, and the liquid collecting tube is fixed on the X-shaped pressure plate.
[0011] As an implementation method, it also includes two end plates, which are respectively arranged at the opposite ends of the multiple battery cells, and the inner side surfaces of the two end plates are respectively arranged to fit the end surfaces of two battery cells located at the opposite ends of the multiple battery cells, and the opposite ends of the "X"-shaped pressure plate are respectively fixed on the top surfaces of the two end plates.
[0012] As an implementation method, it further includes a restraining member, which is arranged around the outer circumference of the entire battery core formed by the plurality of battery cores and the two end plates.
[0013] As an implementation method, it also includes multiple connecting parts and two output parts, each of the battery cells is provided with two poles, one of the poles of two adjacent battery cells is connected by the connecting part, so that the multiple battery cells are connected in series, and the other poles of two battery cells located at opposite ends of the multiple battery cells are connected to the output part.
[0014] As an implementation method, the poles are each provided with a first thread, the connecting members each include two connecting covers and a connecting row, the two connecting covers are fixedly connected via the connecting row, a second thread is provided inside the connecting cover, the first thread is threadedly connected to the second thread, so that the poles are threadedly connected to the connecting covers.
[0015] As an implementation method, a through hole is provided on the connection cover, and a connection sheet is provided inside the connection cover, and the connection row is connected to the connection sheet by riveting.
[0016] As an implementable embodiment, the output component includes an output cover, an output line and a connector connected in sequence, a third thread is provided in the output cover, and the first thread is threadedly connected to the third thread so that the pole is threadedly connected to the output cover.
[0017] The second aspect of the embodiment of the utility model provides a battery pack, comprising the above-mentioned battery module. The battery module can solve the problem of thermal runaway risk of lithium batteries due to increased charging rate in the prior art, and improve the heat dissipation capacity of the battery module by increasing the cooling area of the battery module, thereby improving the safety of the battery pack.
[0018] The beneficial effects of the embodiments of the utility model include:
[0019] The battery module includes a plurality of battery cells arranged in sequence, each battery cell includes a battery cell body, a U-shaped side cold plate, a U-shaped end cold plate and a U-shaped flow channel top plate, the U-shaped side cold plate and the U-shaped end cold plate are cross-arranged, the inner side surfaces of the U-shaped side cold plate are respectively fitted with the bottom surface of the battery cell body and the two side surfaces of the battery cell body, the inner side surfaces of the U-shaped end cold plate are respectively fitted with the bottom surface of the U-shaped side cold plate and the two end surfaces of the battery cell body, and the U-shaped flow channel top plate is fixedly arranged on the top surface of the battery cell body and is connected with the U-shaped side cold plate and the U-shaped end cold plate to jointly form a cooling flow channel for the circulation of coolant. Compared with the heat dissipation method provided in the prior art, which can only cool the bottom surface of the battery cell body, the battery module provided in the present application forms a cooling channel for the circulation of coolant through a U-shaped side cold plate, a U-shaped end cold plate and a U-shaped channel top plate, and through the layout design of the U-shaped side cold plate and the U-shaped end cold plate, not only can the cooling area of the battery cell body (including the bottom surface, two side surfaces and two end surfaces) be significantly increased, but also the cooling effect of the bottom surface of the battery cell body can be further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 One of the structural schematic diagrams of the battery cell provided in the embodiment of the utility model;
[0022] Figure 2 The second structural schematic diagram of the battery cell provided by the embodiment of the utility model;
[0023] Figure 3 A schematic diagram of the structure of a battery module provided by an embodiment of the utility model;
[0024] Figure 4 for Figure 3 A partial enlarged view of
[0025] Figure 5 One of the structural schematic diagrams of the connecting piece provided in the embodiment of the utility model;
[0026] Figure 6 The second structural schematic diagram of the connecting member provided in the embodiment of the utility model;
[0027] Figure 7 A schematic diagram of the structure of an output element provided in an embodiment of the utility model.
[0028] Icons: 100-battery module; 10-battery cell; 11-battery cell body; 111-pole; 12-U-shaped side cold plate; 121-branch channel; 13-U-shaped end cold plate; 14-U-shaped channel top plate; 141-turning groove; 142-opening; 15-insulating film; 20-collecting pipe; 21-mounting frame; 30-connecting pipe; 40-J-shaped pressure plate; 50-end plate; 51-fastener; 60-binding piece; 70-connecting piece; 71-connecting cover; 711-connecting plate; 72-connecting row; 80-output piece; 81-output cover; 82-output line; 83-connector. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] Please refer to Figures 1 to 7 The embodiment of the present application provides a battery module 100, comprising a plurality of battery cells 10 arranged in sequence, each battery cell 10 comprising a battery cell body 11, a U-shaped side cold plate 12, a U-shaped end cold plate 13 and a U-shaped flow channel top plate 14, the U-shaped side cold plate 12 and the U-shaped end cold plate 13 are cross-arranged, the inner side surfaces of the U-shaped side cold plate 12 are respectively fitted with the bottom surface of the battery cell body 11 and the two side surfaces of the battery cell body 11, the inner side surfaces of the U-shaped end cold plate 13 are respectively fitted with the bottom surface of the U-shaped side cold plate 12 and the two end surfaces of the battery cell body 11, the U-shaped flow channel top plate 14 is fixedly arranged on the top surface of the battery cell body 11 and is connected with the U-shaped side cold plate 12 and the U-shaped end cold plate 13 to jointly form a cooling flow channel for the circulation of coolant. The battery module 100 can solve the problem in the prior art that lithium batteries have a risk of thermal runaway due to increasing the charging rate, and by increasing the cooling area of the battery module 100, the heat dissipation capacity of the battery module 100 is improved, thereby improving the safety of the battery pack.
[0036] It should be noted that if Figure 3As shown, the battery module 100 includes a plurality of battery cells 10 arranged in sequence, so as to form the battery module 100 by connecting the plurality of battery cells 10 in series and in parallel. As for the implementation of the series and parallel connection between the plurality of battery cells 10, the electrical connection between two adjacent battery cells 10 can be realized by a tab or the like, and those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific restrictions are made here.
[0037] Specifically, Figure 1 As shown, each battery cell 10 includes a battery cell body 11, which is a square structure. The battery cell body 11 has six faces, namely a bottom face, a top face, two side faces (or small faces) and two end faces (or large faces). At present, most of them add a liquid cooling plate at the bottom of the battery cell body 11 to cool the bottom surface of the battery cell body 11. However, in the actual working process, each face of the battery cell body 11 will accumulate a certain amount of heat. Therefore, this heat dissipation method has the problem of poor cooling effect.
[0038] In order to solve the above problems, Figure 1 As shown, each battery cell 10 includes a U-shaped side cold plate 12, a U-shaped end cold plate 13 and a U-shaped flow channel top plate 14, wherein the U-shaped side cold plate 12 and the U-shaped end cold plate 13 are cross-arranged, and the U-shaped flow channel top plate 14 is fixedly arranged on the top surface of the battery cell body 11, and the U-shaped flow channel top plate 14 is interconnected with the U-shaped side cold plate 12 and the U-shaped end cold plate 13 to jointly form a cooling flow channel for the circulation of coolant, so that the coolant can circulate in the cooling flow channel to cool different surfaces of the battery cell body 11.
[0039] The above-mentioned U-shaped side cold plate 12 and U-shaped end cold plate 13 are cross-arranged. In other words, the orthographic projection of the U-shaped side cold plate 12 on the bottom surface of the battery cell body 11 and the orthographic projection of the U-shaped end cold plate 13 on the bottom surface of the battery cell body 11 are perpendicular to each other, so that different surfaces of the battery cell body 11 can be cooled by the U-shaped side cold plate 12 and the U-shaped end cold plate 13. Originally, the three surfaces of the battery cell body 11 can be cooled by the U-shaped side cold plate 12, and the other three surfaces of the battery cell body 11 can be cooled by the U-shaped end cold plate 13. However, since the top surface of the battery cell body 11 needs to be exposed to facilitate the series-parallel connection between the poles 111 located on the top surface of the battery cell body 11, one of the surfaces of the U-shaped side cold plate 12 and the U-shaped end cold plate 13 is overlapped in the actual layout design.
[0040] Specifically, Figure 1As shown, during actual assembly, the inner side surface of the U-shaped side cold plate 12 can be respectively fitted with the bottom surface of the battery cell body 11 and the two side surfaces of the battery cell body 11, and then the inner side surface of the U-shaped end cold plate 13 can be respectively fitted with the bottom surface of the U-shaped side cold plate 12 and the two end surfaces of the battery cell body 11, and finally the insulating film 15 can be coated. In this way, the bottom surface and the two side surfaces of the battery cell body 11 can be cooled by the U-shaped side cold plate 12, and the bottom surface of the U-shaped side cold plate 12 and the two end surfaces of the battery cell body 11 can be cooled by the U-shaped end cold plate 13, which can not only realize the cooling of the five surfaces (i.e., the bottom surface, the two side surfaces and the two end surfaces) of the battery cell body 11, but also enhance the cooling effect of the bottom surface of the battery cell body 11.
[0041] Compared with the heat dissipation method provided in the prior art, which can only cool the bottom surface of the battery cell body 11, the battery module 100 provided in the present application forms a cooling channel for the circulation of coolant through the U-shaped side cold plate 12, the U-shaped end cold plate 13 and the U-shaped channel top plate 14, and through the layout design of the U-shaped side cold plate 12 and the U-shaped end cold plate 13, not only can the cooling area of the battery cell body 11 (including the bottom surface, two side surfaces and two end surfaces) be significantly increased, but also the cooling effect on the bottom surface of the battery cell body 11 can be further enhanced.
[0042] As an implementation method, Figure 2 As shown, a plurality of branch channels 121 arranged in parallel and at intervals are provided in the U-shaped side cold plate 12 and the U-shaped end cold plate 13, and a turning groove 141 is provided in the U-shaped channel top plate 14, and two adjacent branch channels 121 are connected to each other through the turning groove 141. Figure 2 In the cross-sectional view, the U-shaped side cold plate 12 is taken as an example, and a plurality of branch channels 121 arranged in parallel and at intervals are provided in the U-shaped side cold plate 12, a turning groove 141 is provided in the U-shaped channel top plate 14, and two adjacent branch channels 121 are interconnected through the turning groove 141. With reference to the above content, those skilled in the art should be able to understand how to provide a plurality of branch channels 121 arranged in parallel and at intervals in the U-shaped end cold plate 13, and a turning groove 141 is provided in the U-shaped channel top plate 14, so that two adjacent branch channels 121 can be interconnected through the turning groove 141, and no further description is given here.
[0043] Considering that the battery module 100 includes a plurality of battery cells 10, in order to fill and drain the cooling channels of the plurality of battery cells 10, as an implementation method, Figure 3As shown, the battery module 100 further includes two liquid collecting pipes 20 and a plurality of connecting pipes 30. Two openings 142 are provided on the U-shaped flow channel top plate 14. The two liquid collecting pipes 20 are connected to the openings 142 on the same side of the U-shaped flow channel top plate 14 of each battery cell 10 through the connecting pipes 30. During actual assembly, one of the liquid collecting pipes 20 can be used as a liquid inlet pipe, and the other liquid collecting pipe 20 can be used as a liquid discharge pipe.
[0044] For example, in this embodiment, the two openings 142 are arranged opposite to each other and are respectively located at the connection between the U-shaped side cold plate 12 and the U-shaped end cold plate 13 . In this way, the coolant entering from the U-shaped side cold plate 12 can first flow in a U-shaped path along the branch channel 121 of the U-shaped side cold plate 12, and then turn under the action of the turning groove 141 of the U-shaped flow channel top plate 14, and then flow in the reverse direction of the U-shaped path along the branch channel 121 of the U-shaped side cold plate 12, and circulate continuously until it flows to one of the openings 142 of the U-shaped flow channel top plate 14, and then reversely flows into the U-shaped end cold plate 13 under the action of the opening 142. Similar to the U-shaped side cold plate 12, it flows in a U-shaped path along the branch channel 121 of the U-shaped end cold plate 13, and then turns under the action of the turning groove 141 of the U-shaped flow channel top plate 14, and then flows in the reverse direction of the U-shaped path along the branch channel 121 of the U-shaped end cold plate 13, and then circulates continuously, and finally flows to another opening 142 of the U-shaped flow channel top plate 14.
[0045] In order to constrain the battery cell 10 to avoid the battery cell 10 from jumping during actual use, as an implementation method, the battery module 100 also includes a "J"-shaped pressing plate 40, which is arranged along the arrangement direction of the multiple battery cells 10. The inner side surface of the "J"-shaped pressing plate 40 (i.e., the connecting plate of the "J"-shaped pressing plate 40) is arranged in affixed with the top surface of the multiple battery cells 10 to cooperate with the box of the battery pack, thereby constraining the battery cell 10 in the vertical direction. The inner side surface of the "J"-shaped pressing plate 40 (i.e., the folding arm plate of the "J"-shaped pressing plate 40) is also arranged in affixed with the end surfaces of two battery cells 10 located at opposite ends of the multiple battery cells 10 to constrain the battery cell 10 in its arrangement direction. The liquid collecting tube 20 can be fixed on the "J"-shaped pressing plate 40 by a "J"-shaped tube clamp, so that the liquid collecting tube 20 is fixed and supported by the "J"-shaped pressing plate 40. For example, in this embodiment, the number of the X-shaped pressing plates 40 is two, and the two X-shaped pressing plates 40 and the two liquid collecting pipes 20 are arranged in a one-to-one correspondence.
[0046] Since the restraining effect of the "X"-shaped pressing plate 40 on the arrangement direction of the battery cells 10 is very limited, as an implementation method, Figure 3As shown, the battery module 100 also includes two end plates 50, which are respectively arranged at the opposite ends of the plurality of battery cells 10, and the inner side surfaces of the two end plates 50 are respectively arranged to fit the end surfaces of the two battery cells 10 located at the opposite ends of the plurality of battery cells 10, so as to constrain the battery cells 10 in their arrangement direction through the two end plates 50, thereby preventing the battery cells 10 from expanding and deforming during the charging process. In addition, the opposite ends of the "J"-shaped pressing plate 40 (i.e., the folded edges of the "J"-shaped pressing plate 40) can also be fixedly arranged on the top surfaces of the two end plates 50 through the mounting frame 21, so as to fix and support the "J"-shaped pressing plate 40 through the end plates 50. For example, in this embodiment, the end plate 50 is provided with a connection hole in the vertical direction, and the fastener 51 is passed through the connection hole to fix the end plate 50 (i.e., the battery module 100) in the box of the battery pack.
[0047] As an implementation method, Figure 3 As shown, the battery module 100 also includes a restraining member 60, which is arranged around the outer periphery of the battery cell 10 formed by a plurality of battery cells 10 and two end plates 50, so as to restrain the battery cell 10 in the circumferential direction, thereby cooperating with the "X"-shaped pressure plate 40 and the end plate 50 to perform limited restraint on the battery cell 10 in all directions. The restraining member 60 may be an elastic band, a plastic steel band, etc., which is not specifically limited here. By way of example, in this embodiment, there are two restraining members 60, one of which is close to the top surface of the battery cell body 11, and the other is close to the bottom surface of the battery cell body 11, so as to improve the restraining effect.
[0048] Regarding the series-parallel connection between the multiple battery cells 10, as an implementation method, Figures 3 to 7 As shown, the battery module 100 also includes a plurality of connectors 70 and two output components 80. Two poles 111 are provided on each battery cell 10. One of the poles 111 of two adjacent battery cells 10 is connected by the connector 70 so that the plurality of battery cells 10 are connected in series. The other poles 111 of two battery cells 10 located at opposite ends of the plurality of battery cells 10 are connected to the output component 80.
[0049] In the prior art, as battery modules enter the market on a large scale, there are certain technical barriers to the early use and later maintenance of battery modules. For example, multiple battery cells in a battery module are usually connected by welding with tabs. Once a problem occurs with a single battery cell in the later stage, the tabs need to be cut, and then the remaining tabs on the poles need to be polished, and finally the tabs need to be welded to the poles of the replacement battery cells. The above maintenance process requires the use of a variety of equipment, which will greatly increase the maintenance cost. How to quickly and efficiently reduce the maintenance cycle and cost is a technical problem faced by industry technicians.
[0050] In order to solve the above problems, as an implementable method, Figures 1 to 7 As shown, different from the prior art, the pole 111 is provided with a first thread, the connecting member 70 includes two connecting covers 71 and a connecting row 72, the two connecting covers 71 are fixedly connected by the connecting row 72, a second thread is provided in the connecting cover 71, the first thread is threadedly connected with the second thread, so that the pole 111 is threadedly connected with the connecting cover 71, thereby facilitating disassembly and assembly.
[0051] As an implementation method, Figure 5 and Figure 6 As shown, a through hole is provided on the connection cover 71, and a connection sheet 711 is provided inside the connection cover 71, and the connection row 72 is connected to the connection sheet 711 by riveting at the position where the through hole is located. It should be noted that the gap between the connection sheet 711 and the connection row 72 can be slightly larger than the thickness of the connection cover 71. This design method can facilitate the connection cover 71 to rotate around the riveting position. In addition, in order to facilitate the tightening installation of the connection cover 71, anti-slip grooves can also be provided on the circumferential outer side thereof to play an anti-slip role.
[0052] As an implementation method, Figure 7 As shown, the output member 80 includes an output cover 81, an output line 82 and a connector 83 connected in sequence. A third thread (essentially the same as the second thread) is provided in the output cover 81. The first thread is threadedly connected to the third thread so that the pole 111 is threadedly connected to the output cover 81, thereby facilitating disassembly and assembly.
[0053] The embodiment of the present application further provides a battery pack, comprising the above-mentioned battery module 100. Since the structure and beneficial effects of the battery module 100 have been described in detail in the above-mentioned embodiment, they will not be described again here.
[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A battery module, characterized in that: The invention comprises a plurality of battery cells arranged in sequence, each of the battery cells comprises a battery cell body, a U-shaped side cold plate, a U-shaped end cold plate and a U-shaped flow channel top plate, the U-shaped side cold plate and the U-shaped end cold plate are cross-arranged, the inner side surfaces of the U-shaped side cold plate are respectively fitted with the bottom surface of the battery cell body and the two side surfaces of the battery cell body, the inner side surfaces of the U-shaped end cold plate are respectively fitted with the bottom surface of the U-shaped side cold plate and the two end surfaces of the battery cell body, the U-shaped flow channel top plate is fixedly arranged on the top surface of the battery cell body and is connected with the U-shaped side cold plate and the U-shaped end cold plate to jointly form a cooling flow channel for the circulation of coolant.
2. The battery module according to claim 1, characterized in that: A plurality of branch flow channels arranged in parallel and at intervals are arranged in the U-shaped side cold plate and the U-shaped end cold plate, a turning groove is arranged in the top plate of the U-shaped flow channel, and two adjacent branch flow channels are connected to each other through the turning groove.
3. The battery module according to claim 1, characterized in that: It also includes two liquid collecting pipes and a plurality of connecting pipes. Two openings are arranged on the U-shaped flow channel top plate. The two liquid collecting pipes are connected with the openings on the same side of the U-shaped flow channel top plate of each battery cell through the connecting pipes.
4. The battery module according to claim 3, characterized in that: It also includes an "X"-shaped pressure plate, which is arranged along the arrangement direction of the multiple battery cells. The inner side surface of the "X"-shaped pressure plate is respectively fitted with the top surface of the multiple battery cells and the end surfaces of two battery cells located at opposite ends of the multiple battery cells. The liquid collecting tube is fixedly arranged on the "X"-shaped pressure plate.
5. The battery module according to claim 4, characterized in that: It also includes two end plates, which are respectively arranged at the opposite ends of the multiple battery cells, and the inner side surfaces of the two end plates are respectively arranged to fit the end surfaces of two battery cells located at the opposite ends of the multiple battery cells, and the opposite ends of the "X"-shaped pressure plate are respectively fixed on the top surfaces of the two end plates.
6. The battery module according to claim 5, characterized in that: It also includes a restraining member, which is arranged around the outer periphery of the entire battery core formed by the plurality of battery cores and the two end plates.
7. The battery module according to claim 1, characterized in that: It also includes multiple connecting parts and two output parts. Each of the battery cells is provided with two poles. One of the poles of two adjacent battery cells is connected by the connecting part so that the multiple battery cells are connected in series. The other poles of two battery cells located at opposite ends of the multiple battery cells are connected to the output part.
8. The battery module according to claim 7, characterized in that: The poles are each provided with a first thread, the connectors each include two connection covers and a connection row, the two connection covers are fixedly connected via the connection row, a second thread is provided inside the connection cover, the first thread is threadedly connected to the second thread, so that the pole is threadedly connected to the connection cover.
9. The battery module according to claim 8, characterized in that: The connection cover is provided with a through hole, and a connection sheet is provided inside the connection cover, and the connection row is connected to the connection sheet by riveting.
10. The battery module according to claim 8, characterized in that: The output member comprises an output cover, an output line and a connector which are connected in sequence. A third thread is arranged in the output cover. The first thread is threadedly connected with the third thread so that the pole is threadedly connected with the output cover.
11. A battery pack, characterized in that: A battery module comprising any one of claims 1 to 10.