Integrated battery module and battery pack

Abstract

The utility model discloses an integrated battery module and a battery pack, the integrated battery module comprises at least two battery cells and heat exchange fins in one-to-one correspondence with the battery cells, and all the battery cells and all the heat exchange fins are integrated through a fixing assembly to form the battery module; the heat exchange fins are used for carrying out heat exchange with the corresponding battery cells, and all the heat exchange fins are connected to the heating film in a heat conduction manner, so that the heat exchange fins can be heated through the heating film and the corresponding battery cells are heated through the heat exchange fins under the condition that the temperature of the battery cells is relatively low, and the temperature of the battery cells is increased; the other surface, far away from the battery cell, of the heating film is in heat conduction connection with the first liquid cooling plate, so that under the condition that the temperature of the battery cell is relatively high, the battery cell can firstly transfer the temperature to the heat exchange fins for primary cooling, and the first liquid cooling plate can cool the heat exchange fins through the heat conduction effect of the heating film and cool the corresponding battery cell through the heat exchange fins; therefore, the temperature stability of the battery in the working process is improved, and the service life of the battery is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solid-state batteries, and more particularly to an integrated battery module and battery pack. BACKGROUND

[0002] At present, in the working process of the all-solid-state battery, due to its large internal resistance, the battery temperature is high during the process of large current charging and discharging, and the battery temperature is low in a low temperature environment because the battery is easily affected by temperature, which leads to unstable temperature of the battery in the working process and affects the service life of the battery.

[0003] To sum up, how to improve the stability of the temperature of the battery in the working process to prolong the service life of the battery is a problem to be solved by the technical personnel in the field at present. CONTENT OF THE INVENTION

[0004] Therefore, the purpose of the present application is to provide an integrated battery module and battery pack to improve the stability of the temperature of the battery in the working process and prolong the service life of the battery.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] An integrated battery module comprises: a battery cell, a heat exchange assembly and a fixing assembly; wherein the battery cell is at least two, the heat exchange assembly comprises a heat exchange fin and a heating film, the heat exchange fin is at least two, the heat exchange fin and the battery cell one-to-one correspond; one side of the heating film close to the battery cell is in thermal conductive connection with all the heat exchange fins, the other side of the heating film away from the battery cell is used for thermal conductive connection with a first liquid cooling plate; the fixing assembly can integrate all the battery cells and all the heat exchange fins.

[0007] In some embodiments, the heat exchange fin comprises a bottom plate and a frame located at the edge of the bottom plate; the bottom plate is attached to the side surface of the battery cell, the frame comprises a first frame and a second frame, the first frame and the second frame are distributed in parallel, the first frame is attached to the top surface of the battery cell, and the second frame is attached to the bottom surface of the battery cell; one side of the first frame away from the battery cell is glued to the heating film through a thermal conductive structure, one side of the second frame away from the battery cell is used for thermal conductive connection with a second liquid cooling plate, and the first liquid cooling plate and the second liquid cooling plate are communicated through a connecting pipe.

[0008] In some embodiments, the heating film comprises a heating element, and the heating film is used for gluing to the first liquid cooling plate through a thermal conductive structure.

[0009] In some embodiments, the first thermal insulation cushion and the second thermal insulation cushion are further included; wherein the first thermal insulation cushion is at least two, the first thermal insulation cushion is located between the heat exchange fin and the battery cell, the first thermal insulation cushion corresponds to the heat exchange fin one by one, and the battery cell, the heat exchange fin, and the first thermal insulation cushion are sequentially distributed along a first direction; the second thermal insulation cushion is located between the battery cell and the fixing assembly.

[0010] In some embodiments, the first thermal insulation cushion is bonded with the heat exchange fin and the battery cell; and / or, the second thermal insulation cushion is bonded with the battery cell and the fixing assembly.

[0011] In some embodiments, the fixing assembly includes a first fixing plate and a second fixing plate; the first fixing plate is two, two first fixing plates are sequentially distributed along a first direction, two first fixing plates are parallel to a second direction, and two first fixing plates limit all battery cells in the first direction; the second fixing plate is two, two second fixing plates are sequentially distributed along a second direction, two second fixing plates are parallel to a first direction, and two second fixing plates limit all battery cells in the second direction; the first direction and the second direction have an included angle.

[0012] In some embodiments, the first fixing plate and the second fixing plate are fixedly connected by a first threaded fastener, the axial direction of the first threaded fastener is consistent with the first direction; the first fixing plate is used to be installed on the box body of the battery pack by a second threaded fastener.

[0013] In some embodiments, a tab support plate is further included, the tab support plate includes a tab support plate body, a connecting hole opened in the tab support plate body, an injection molded copper bar fixedly connected to the tab support plate body, and an output stage; the battery cell is provided with a battery cell tab; the connecting hole is at least two, the connecting hole corresponds to the battery cell one by one, and the connecting hole is used for the battery cell tab to pass through; the injection molded copper bar is at least two, the injection molded copper bar corresponds to the connecting hole one by one, and the injection molded copper bar is fixedly connected with the battery cell tab; the output stage is used to connect the battery EDM system.

[0014] In some embodiments, a sampling system is further included, the sampling system includes a fixedly connected connector, a circuit board, and a nickel sheet; the connector is used to connect the battery BMS system, the nickel sheet is at least two, the nickel sheet corresponds to the injection molded copper bar one by one, and the nickel sheet is fixedly connected with the injection molded copper bar.

[0015] In some embodiments, a first insulating film and a second insulating film are further included; the first insulating film is fixedly connected to the bottom end of the battery cell; and the second insulating film is fixedly connected to one side of the second fixed plate close to the battery cell.

[0016] A battery pack comprises an upper cover, a box, a battery EDM system, a battery BMS system, a cooling assembly, and at least two integrated battery modules as described above; wherein the cooling assembly comprises a first liquid cooling plate and a second liquid cooling plate communicated through a connecting pipe, the second liquid cooling plate is sealingly connected to the inner bottom surface of the box; and the upper cover is sealingly connected to the box.

[0017] The integrated battery module provided by the application comprises at least two battery cells and heat exchange fins corresponding to the battery cells, all the battery cells and all the heat exchange fins are integrated by a fixing assembly to form a battery module; the heat exchange fins are used for heat exchange with the corresponding battery cells, and all the heat exchange fins are thermally connected to a heating film, so that in the case that the temperature of the battery cell is low, the heat exchange fins can be heated by the heating film, and the corresponding battery cell is heated by the heat exchange fins to increase the temperature of the battery cell; the other side of the heating film away from the battery cell is thermally connected to a first liquid cooling plate, so that in the case that the temperature of the battery cell is high, the battery cell can first transfer the temperature to the heat exchange fins for preliminary cooling, and the first liquid cooling plate can cool the heat exchange fins through the heat conduction effect of the heating film, and the corresponding battery cell is cooled through the heat exchange fins to reduce the temperature of the battery cell, thereby improving the temperature stability of the battery during operation and prolonging the service life of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0019] Figure 1 The structural schematic diagram of the integrated battery module provided by the embodiment of the present application;

[0020] Figure 2 The assembly schematic diagram of the battery cell and the heat exchange assembly in the integrated battery module provided by the embodiment of the present application;

[0021] Figure 3 The structural schematic diagram of the heat insulation buffer pad in the integrated battery module provided by the embodiment of the present application;

[0022] Figure 4 The structural schematic diagram of the restraint system in the integrated battery module provided by the embodiment of the present application;

[0023] Figure 5 A structural schematic diagram of an insulation system in an integrated battery module is provided for the embodiment of the present application.

[0024] Figure 6 A structural schematic diagram of a sampling system in an integrated battery module is provided for the embodiment of the present application.

[0025] Figure 7 A structural schematic diagram of a tab support plate in an integrated battery module is provided for the embodiment of the present application.

[0026] Figure 8 A schematic diagram of an integrated battery module cooperating with a cooling assembly is provided for the embodiment of the present application.

[0027] Figure 9 A structural schematic diagram of a battery pack is provided for the embodiment of the present application.

[0028] Explanation of reference signs:

[0029] 100-integrated battery module, 110-cell, 111-tab of cell, 120-heat exchange fin, 1201-bottom plate, 1202-frame, 121-heating film, 1211-heating element, 131-first heat insulation buffer pad, 132-second heat insulation buffer pad, 141-first insulation film, 142-second insulation film, 151-first fixed plate, 152-second fixed plate, 153-first threaded fastener, 154-second threaded fastener, 160-tab support plate, 161-body of tab support plate, 162-connection hole, 163-injection copper bar, 164-output stage, 170-sampling system, 171-connector, 172-circuit board, 173-nickel sheet;

[0030] 210-first liquid cooling plate, 220-second liquid cooling plate, 230-connection pipe;

[0031] 300-battery EDM system;

[0032] 400-battery BMS system;

[0033] 510-upper cover, 520-box body. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing the specific embodiments and are not intended to be limiting to the present application. As used in the specification and the appended claims of the present application, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “one or more,” “at least one,” “one or more of’ in the embodiments of the present application refer to one, two or more than two; “and / or” describes the associated objects in the association relationship, which means that there can be three kinds of relationships; for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character “ / ” generally represents an “or” relationship between the associated objects.

[0036] In the present specification, the reference to “one embodiment” or “some embodiments” etc. means that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, the statements “in one embodiment”, “in some embodiments”, “in other embodiments”, “in additional embodiments” etc. appearing in various places in the present specification are not necessarily all referring to the same embodiment, but mean “one or more but not all embodiments”, unless otherwise specifically stated. The terms “comprise”, “include”, “have” and their conjugates mean “including but not limited to”, unless otherwise specifically stated.

[0037] The plurality referred to in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the terms “first”, “second” etc. are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0038] The “parallel” and “perpendicular” referred to in the present application are “substantially parallel” and “substantially perpendicular” in actual operation. “Substantially parallel” can be understood as parallel with a certain error, and similarly, “substantially perpendicular” can be understood as perpendicular with a certain error.

[0039] As Figures 1-9As shown, the integrated battery module 100 provided by the embodiment of the present application comprises the battery cell 110, the heat exchange assembly and the fixing assembly. The battery cell 110 is at least two, the heat exchange assembly comprises the heat exchange fin 120 and the heating film 121, the heat exchange fin 120 is at least two, and the heat exchange fin 120 corresponds to the battery cell 110 one by one, the heat exchange fin 120 is used for heat exchange with the corresponding battery cell 110; and one side of the heating film 121 close to the battery cell 110 is in heat conduction connection with all the heat exchange fins 120, and the other side of the heating film 121 away from the battery cell 110 is in heat conduction connection with the first liquid cooling plate 210. In this way, in the case that the temperature of the battery cell 110 is relatively low, the heat exchange fin 120 can be heated by the heating film 121, and the corresponding battery cell 110 can be heated by the heat exchange fin 120, so as to improve the temperature of the battery cell 110; in the case that the temperature of the battery cell 110 is relatively high, the battery cell 110 can first transfer the temperature to the heat exchange fin 120 for preliminary cooling, and the first liquid cooling plate 210 can cool the heat exchange fin 120 through the heat conduction effect of the heating film 121, and cool the corresponding battery cell 110 through the heat exchange fin 120, so as to reduce the temperature of the battery cell 110. In this way, the stability of the temperature of the battery during the working process is improved, and the service life of the battery is prolonged.

[0040] As shown in the figure, Figure 2 The heating film 121 comprises the heating element 1211, which can be a heater or other heating device, and one side of the heating film 121 is adhered to the heat exchange fin 120 through the heat conduction structure, and the other side of the heating film 121 is also adhered to the first liquid cooling plate 210 through the heat conduction structure, so that the first liquid cooling plate 210, the heating film 121 and the heat exchange fin 120 have good heat conduction effect, so as to ensure the efficiency of heat exchange of the battery cell 110.

[0041] In some embodiments, the heating film 121 can be a metal such as aluminum which has good heat conduction effect, and the embodiment of the present application does not limit this.

[0042] In order to ensure the normal operation of the integrated battery module 100, the surface of the heating film 121 is insulated to reduce the insulation failure caused by the contact of the integrated battery module 100 with metal foreign matters during the operation, so as to ensure the normal operation.

[0043] In order to further improve the heat exchange effect of the heat exchange assembly on the battery cell 110, as shown in the figure, Figure 2As shown, the heat exchange fin 120 includes a bottom plate 1201 and a frame 1202 located at the edge of the bottom plate 1201. Among them, the bottom plate 1201 is attached to the side surface of the battery cell 110, and it should be noted that the side surface of the battery cell 110 is the largest plane of the battery cell 110; the frame 1202 includes symmetrically distributed first and second frames, and the first and second frames are parallelly distributed, the first frame is attached to the top surface of the battery cell 110, and the second frame is attached to the bottom surface of the battery cell 110. In this way, the heat exchange fin 120 can contact the side surface, top surface and bottom surface of the battery cell 110 respectively, expand the contact area of the heat exchange fin 120 and the battery cell 110, and improve the heat exchange efficiency between the heat exchange fin 120 and the battery cell 110.

[0044] In the connection process, as shown in Figure 8 As shown, one side of the first frame away from the battery cell 110 is adhesively connected to the heating film 121 through a heat-conducting structure, and the second frame away from the battery cell 110 is heat-conductively connected to the second liquid cooling plate 220, and the first liquid cooling plate 210 and the second liquid cooling plate 220 are communicated through the connecting pipe 230. In this way, when the temperature of the battery cell 110 is relatively high, the cooling liquid can pass through the first liquid cooling plate 210 to the heating film 121, then to the heat exchange fin 120, and then pass through the second liquid cooling plate 220 and then pass through the connecting pipe 230 to return to the first liquid cooling plate 210, forming a circulating cooling, which can continuously take away the heat of the battery cell 110, and improve the efficiency of cooling the battery cell 110.

[0045] As shown in Figure 8 The first liquid cooling plate 210 and the second liquid cooling plate 220 are sealingly connected through the connecting pipe 230 with a connecting head, so that the first liquid cooling plate 210 and the second liquid cooling plate 220 can be installed and removed, which is convenient for maintenance, and the connecting pipe 230 is provided with a pump body, which can drive the cooling liquid to flow between the first liquid cooling plate 210 and the second liquid cooling plate 220, and ensure the cooling effect of the battery cell 110.

[0046] Since the integrated battery module 100 will be shaken during operation, in order to ensure the stable operation of the battery cells 110, as shown in Figure 3 As shown, the integrated battery module 100 further includes a first heat insulation buffer pad 131 and a second heat insulation buffer pad 132; the first heat insulation buffer pad 131 is at least two and is located between the heat exchange fin 120 and the battery cell 110, and the first heat insulation buffer pad 131 corresponds to the heat exchange fin 120 one by one, and the battery cell 110, the heat exchange fin 120 and the first heat insulation buffer pad 131 are sequentially distributed along the first direction, so that one battery cell 110, one heat exchange fin 120 and one first heat insulation buffer pad 131 are fixed as an integrated group, and a plurality of integrated groups are sequentially distributed along the first direction to form the integrated battery module 100.

[0047] In actual cases, in order to ensure the stability of the fixing of the first thermal insulation buffer pad 131, the first thermal insulation buffer pad 131 is fixedly connected with the heat exchange fins 120, which can be bonded by double-sided adhesive tape to ensure the fixing effect.

[0048] As shown in Figure 3 , the second thermal insulation buffer pad 132 is located between the battery cell 110 and the fixing assembly, and the two surfaces of the second thermal insulation buffer pad 132 are bonded with the battery cell 110 and the fixing assembly respectively by double-sided adhesive tape to achieve thermal insulation and buffering between the battery cell 110 and the fixing assembly.

[0049] In the actual connection process, after the multiple groups of battery cells 110, heat exchange fins 120 and first thermal insulation buffer pads 131 are sequentially distributed, connection and fixing need to be performed, as shown in Figure 7 The integrated battery module 100 further includes a tab support plate 160, each battery cell 110 is provided with a battery cell tab 111, the tab support plate 160 includes a tab support plate body 161, a connecting hole 162 opened in the tab support plate body 161, and an injection copper bar 163 and an output stage 164 fixedly connected to the tab support plate body 161.

[0050] The connecting hole 162 is at least two, and the connecting hole 162 corresponds to the battery cell 110 one by one, the connecting hole 162 can pass through the battery cell tab 111, the battery cell tab 111 can be fixedly connected with the injection copper bar 163 after passing through, the injection copper bar 163 is at least two and corresponds to the connecting hole 162 one by one, as shown in Figure 7 The injection copper bar 163 is located at the bottom end of the connecting hole 162, which is convenient for the battery cell tab 111 to pass through and connect with the injection copper bar 163; the output stage 164 is located at the top end of the tab support plate body 161, which is convenient for connecting with the battery EDM system 3 (Electric Discharge Machining, power supply system).

[0051] As shown in Figure 1 , the tab support plate 160 is two, and is sequentially distributed along the second direction, and the two tab support plates 160 can pre-fix the multiple integrated groups.

[0052] After connecting the tab support plate 160, the sampling system 170 also needs to be connected, as shown in Figure 1 and Figure 6As shown, the sampling system 170 includes a fixed connection connector 171, a circuit board 172, and a nickel sheet 173; wherein the connector 171 is used to connect the battery BMS system (Electric Discharge Machining, battery management system), the nickel sheet 173 is at least two, and the nickel sheet 173 corresponds to the injection molded copper bar 163 one by one, so that the nickel sheet 173 can be connected to the cell tab 111 by fixed connection with the injection molded copper bar 163, so as to monitor and collect data of the cell 110 through the battery BMS system.

[0053] As shown in Figure 1 The sampling system 170 is two, and is distributed in sequence along the second direction, and the sampling system 170 corresponds to the tab support plate 160 one by one, so as to realize the control of the cell 110.

[0054] In order to reduce the insulation failure caused by metal foreign matter in the process of integrating the battery module 100, as shown in Figure 1 and Figure 5 The integrated battery module 100 further includes a first insulation film 141 and a second insulation film 142. After the tab support plate 160 and the sampling system 170 are connected, the first insulation film 141 is fixedly connected to the bottom end of all the cells 110; the second insulation film 142 is two, and is fixedly connected to one side of the second fixed plate 152 close to the cell 110 mentioned below. In this way, through the insulation treatment of the heating film 121, the first insulation film 141 and the second insulation film 142, the insulation failure phenomenon is reduced, and the stable operation of the integrated battery module 100 is ensured.

[0055] In order to constrain the integrated battery module 100, as shown in Figure 1 and Figure 4 The fixed assembly includes a first fixed plate 151 and a second fixed plate 152. Among them, the first fixed plate 151 is two, the two first fixed plates 151 are distributed in sequence along the first direction, and the two first fixed plates 151 are parallel to the second direction, and the two first fixed plates 151 can limit all the cells 110 in the first direction.

[0056] The second fixed plate 152 is two, and the two second fixed plates 152 are distributed in sequence along the second direction, and the two second fixed plates 152 are parallel to the first direction, and the two second fixed plates 152 limit all the cells 110 in the second direction.

[0057] In the actual connection process, the integrated groups formed by the plurality of battery cells 110, the heat exchange fins 120 and the first thermal insulation buffer pads 131 are sequentially distributed and connected with the tab support plates 160. In the first direction, the length of all the integrated groups is slightly longer than the length of the second fixed plates 152, so two first fixed plates 151 are needed to provide a certain extrusion load to the sequentially distributed integrated groups. Then, the two second fixed plates 152 are limited in the second direction, so that the first fixed plates 151 and the second fixed plates 152 can provide a pre-tightening force to the integrated groups formed by the battery cells 110, the heat exchange fins 120 and the first thermal insulation buffer pads 131, further improving the stability of the integrated battery module 100.

[0058] It should be noted that the first direction and the second direction can be obtuse, acute and right angle. In order to ensure the stability of the integrated battery module 100, in the embodiment of the present application, the first direction is perpendicular to the second direction.

[0059] As shown in Figure 4 , the first fixed plate 151 and the second fixed plate 152 are fixedly connected through the first threaded fastener 153, and the axial direction of the first threaded fastener 153 is consistent with the first direction, so that the second fixed plate 152 can be located inside the first fixed plate 151, so that the second fixed plate 152 provides a pre-tightening force to the integrated group in the second direction, further improving the stability of the integrated battery module 100, and reducing the size of the integrated battery module 100.

[0060] The first fixed plate 151 is used to be installed in the box 520 of the battery pack through the second threaded fastener 154, facilitating the installation and fixation of the integrated battery module 100.

[0061] In the assembly of the integrated battery module 100 provided in the embodiment of the present application, first, the second thermal insulation buffer pad 132 is fixedly bonded on the first fixed plate 151. Then, the integrated groups of the integrated battery cells 110, the heat exchange fins 120 and the first thermal insulation buffer pads 131 are sequentially stacked and fixedly bonded. Then, the cell tabs 111 of each battery cell 110 are respectively inserted through the connecting holes 162 in the corresponding tab support plate 160, and the cell tabs 111 are fixedly connected to the injection molded copper bar 163. Then, the nickel sheet 173 in the sampling system 170 is fixedly connected to the corresponding injection molded copper bar 163. Then, the first insulating film 141 is fixed to the bottom end of the battery cell 110, and the second insulating film 142 is fixed to the side of the second fixed plate 152 close to the battery cell 110. Then, the first fixed plate 151 and the second fixed plate 152 are fixedly connected through the first threaded fastener 153. Then, the heating film 121 is fixedly bonded to the top surface of the first frame of all the heat exchange fins 120, to complete the assembly of the integrated battery module 100.

[0062] As shown in Figure 9As shown, the embodiments of the present application also provide a battery pack, comprising the upper cover 510, the box 520, the battery EDM system 300, the battery BMS system 400, a cooling assembly, and the integrated battery module 100 as above. Wherein, the cooling assembly comprises the first liquid cooling plate 210 and the second liquid cooling plate 220 which are communicated through the connecting pipe 230, the second liquid cooling plate 220 is sealingly connected to the inner bottom surface of the box 520, and the upper cover 510 and the box 520 are sealingly connected.

[0063] Since the integrated battery module 100 has the above technical effects, the battery pack comprising the integrated battery module 100 also has corresponding technical effects, which will not be repeated here.

[0064] In the assembly of the battery pack provided by the embodiments of the present application, first, the second liquid cooling plate 220 is fixedly connected to the inner bottom surface of the box 520, which can be fixed by screw fasteners and adhesion to ensure the fixing effect, then the integrated battery module 100 is fixedly connected to the second liquid cooling plate 220 by the second screw fastener 540, which can also be adhesively connected at the same time to improve the fixing effect, then each integrated battery module 100 is connected with the battery EDM system 300 and the battery BMS system 400 respectively, then the first liquid cooling plate 210 is fixedly and adhesively connected to the top end of all integrated battery modules 100, and the first liquid cooling plate 210 and the second liquid cooling plate 220 are communicated, finally, the upper cover 510 and the box 520 are sealingly connected to realize the assembly of the battery pack.

[0065] The above description of disclosed embodiments enables one skilled in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated battery module, characterized by, The application relates to a battery pack, which comprises the following components: an electric core (110), a heat exchange assembly and a fixing assembly; wherein the electric core (110) is at least two, the heat exchange assembly comprises heat exchange fins (120) and a heating film (121), the heat exchange fins (120) are at least two, the heat exchange fins (120) and the electric core (110) are one-to-one corresponding; one side of the heating film (121) close to the electric core (110) is in heat conduction connection with all the heat exchange fins (120), and the other side of the heating film (121) away from the electric core (110) is used for being in heat conduction connection with a first liquid cooling plate (210); the fixing assembly can integrate all the electric cores (110) and all the heat exchange fins (120).

2. The integrated battery module of claim 1, wherein, The heat exchange fin (120) comprises a bottom plate (1201) and a frame (1202) located at the edge of the bottom plate (1201); the bottom plate (1201) is attached to the side surface of the electric core (110), the frame (1202) comprises a first frame and a second frame, the first frame and the second frame are parallelly distributed, the first frame is attached to the top surface of the electric core (110), and the second frame is attached to the bottom surface of the electric core (110); one side of the first frame away from the electric core (110) is glued to the heating film (121) through a heat conduction structure, one side of the second frame away from the electric core (110) is used for being in heat conduction connection with a second liquid cooling plate (220), and the first liquid cooling plate (210) and the second liquid cooling plate (220) are communicated through a connecting pipe (230).

3. The integrated battery module of claim 1, wherein, The heating film (121) comprises a heating element (1211), and the heating film (121) is used for being glued to the first liquid cooling plate (210) through a heat conduction structure.

4. The integrated battery module of claim 1, wherein, The application further comprises a first heat insulation buffer pad (131) and a second heat insulation buffer pad (132); wherein the first heat insulation buffer pad (131) is at least two, the first heat insulation buffer pad (131) is located between the heat exchange fin (120) and the electric core (110), the first heat insulation buffer pad (131) is one-to-one corresponding to the heat exchange fin (120), and the electric core (110), the heat exchange fin (120) and the first heat insulation buffer pad (131) are sequentially distributed along a first direction; the second heat insulation buffer pad (132) is located between the electric core (110) and the fixing assembly.

5. The integrated battery module of claim 4, wherein, The first heat insulation buffer pad (131) is glued to the heat exchange fin (120) and the electric core (110); and / or, the second heat insulation buffer pad (132) is glued to the electric core (110) and the fixing assembly.

6. The integrated battery module of claim 1, wherein, The fixing assembly comprises a first fixing plate (151) and a second fixing plate (152); the first fixing plate (151) is two, the two first fixing plates (151) are sequentially distributed along a first direction, the two first fixing plates (151) are parallel to a second direction, and the two first fixing plates (151) limit all the electric cores (110) in the first direction; The second fixing plate (152) is two, and the two second fixing plates (152) are sequentially distributed along a second direction, and the two second fixing plates (152) are parallel to the first direction, and the two second fixing plates (152) limit all the battery cells (110) in the second direction. The first direction and the second direction have an included angle.

7. The integrated battery module of claim 6, wherein, The first fixing plate (151) is fixedly connected with the second fixing plate (152) through a first threaded fastener (153), and an axial direction of the first threaded fastener (153) is consistent with the first direction. The first fixing plate (151) is arranged on a box (520) of a battery pack through a second threaded fastener (154).

8. The integrated battery module of claim 1, wherein, Further comprising a tab support plate (160), the tab support plate (160) comprises a tab support plate body (161), a connecting hole (162) arranged on the tab support plate body (161), an injection molded copper bar (163) fixedly connected with the tab support plate body (161), and an output stage (164). The battery cell (110) is provided with a battery cell tab (111). The connecting hole (162) is at least two, the connecting hole (162) corresponds to the battery cell (110), and the connecting hole (162) is used for the battery cell tab (111) to pass through. The injection molded copper bar (163) is at least two, the injection molded copper bar (163) corresponds to the connecting hole (162), and the injection molded copper bar (163) is fixedly connected with the battery cell tab (111). The output stage (164) is used for connecting a battery EDM system (300).

9. The integrated battery module of claim 8, wherein, Further comprising a sampling system (170), the sampling system (170) comprises a fixedly connected connector (171), a circuit board (172), and a nickel sheet (173); The connector (171) is used for connecting a battery BMS system (400), the nickel sheet (173) is at least two, the nickel sheet (173) corresponds to the injection molded copper bar (163), and the nickel sheet (173) is fixedly connected with the injection molded copper bar (163).

10. The integrated battery module of claim 6, wherein, Further comprising a first insulating film (141) and a second insulating film (142); The first insulating film (141) is fixedly connected to the bottom end of the battery cell (110); and the second insulating film (142) is fixedly connected to one side of the second fixing plate (152) close to the battery cell (110).

11. A battery pack, characterized by Comprise: an upper cover (510), a box (520), a battery EDM system (300), a battery BMS system (400), a cooling assembly, and at least two integrated battery modules (100) according to any one of claims 1-10; The cooling assembly comprises a first liquid cooling plate (210) and a second liquid cooling plate (220) communicated through a connecting pipe (230), and the second liquid cooling plate (220) is sealingly connected to the inner bottom surface of the box (520). The upper cover (510) is sealingly connected with the box (520).

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