Semi-solid battery cell module and battery module

Abstract

The utility model discloses a semi-solid battery cell module and a battery module. The semi-solid battery cell module comprises a battery cell and a heat dissipation plate arranged on one side of the battery cell, the heat dissipation plate is provided with an upper folding edge and a lower folding edge, the upper folding edge and the lower folding edge surround the upper side face and the lower side face of the battery cell on the outer side, the left end and the right end of the battery cell are fixed through a battery cell fixing frame, a directional explosion-clearing hole is formed in the upper folding edge, and the directional explosion-clearing hole is formed in the lower folding edge. And the lower folding edge is used for being contacted and fixed with the bottom of the battery box body. According to the utility model, the left end and the right end of the battery cell are fixed by the battery cell fixing frame, the directional explosion removal hole is formed in the upper folding edge, and the lower folding edge is used for being contacted and fixed with the bottom of the battery box body, so that the directional explosion removal of the battery cell during thermal runaway can be realized, and the battery cell module can directionally release high-temperature flue gas during thermal runaway; the safety of the battery module and the system is improved, and the situation that the battery cell explodes and sprays from all directions is solved.

Description

Technical Field

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

[0002] Since the semi-solid battery itself is wrapped by an aluminum-plastic film, when the semi-solid battery has thermal runaway, the battery core will explode on the sides. In the prior art, the technology for directional explosion disposal of semi-solid batteries is still insufficient and directional explosion disposal cannot be achieved. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies and defects of the prior art and to provide a semi-solid battery cell module and a battery module.

[0004] A first aspect of the utility model provides a semi-solid battery cell module, comprising a battery cell and a heat sink arranged on one side of the battery cell, the heat sink having an upper folding edge and a lower folding edge, the upper folding edge and the lower folding edge surrounding the upper side surface and the lower side surface of the battery cell on the outside, the left and right ends of the battery cell being fixed by a battery cell fixing frame, a directional explosion-discharging hole being formed on the upper folding edge, and the lower folding edge being used for contacting and fixing with the bottom of a battery box.

[0005] Among them, the battery cell fixing frame includes a fixing bracket and a pressing plate. There are two fixing brackets, which are symmetrically arranged near the two ends of the heat sink; there are two pressing plates, which cooperate with the fixing brackets and are bonded and fixed to press the battery cell tightly on the heat sink.

[0006] Among them, the upper folded edge has a glue filling hole, and the connecting surface of the fixed bracket and the heat sink has a glue hole. After the fixed bracket is installed in the heat sink, the glue injected from the glue filling hole fills the connecting surface of the fixed bracket and the heat sink through the glue hole, thereby fixing the fixed bracket to the heat sink.

[0007] Wherein, a guide cylinder is arranged on the fixed bracket, and a guide column cooperating with the guide cylinder is arranged on the pressure plate.

[0008] Among them, a first clamping part is provided on the fixing bracket, and a second clamping part cooperating with the first clamping part is arranged on the pressing plate. The first clamping part cooperates with the second clamping part to clamp the aluminum-plastic film and the tab at the corresponding position of the battery cell.

[0009] The fixing bracket has buckles for fixing the busbars of the battery module and a hot melting point for the FPC assembly, and the hot melting point is used for fixing the FPC assembly by hot riveting.

[0010] The lower folded edge is formed with glue holes, which are used for the glue in the battery box to enter and fix the sealed edge at the lower end of the battery cell to the heat sink when the battery module is fixed by glue pre-applied inside the battery box.

[0011] Wherein, a heat insulation pad is bonded and arranged on the side of the battery core away from the heat sink, and the battery core is glued and fixed to the heat sink.

[0012] Among them, the pressure plate is provided with battery cell stacking positioning columns, and the heat dissipation plate is provided with corresponding battery cell stacking positioning holes, two of each, which are arranged spaced apart from each other up and down.

[0013] A second aspect of the present invention provides a battery module, comprising the semi-solid battery cell module of the first aspect of the present invention.

[0014] The semi-solid battery cell module of the utility model is fixed by a battery cell fixing frame at the left and right ends of the battery cell, a directional explosion-removing hole is formed on the upper folded edge, and the lower folded edge is used for contacting and fixing with the bottom of the battery box body, so that the left and right ends and the lower end of the module are all fixed, and only the directional explosion-removing hole of the upper folded edge is retained, so that the directional explosion-removing of the battery cell in the event of thermal runaway can be achieved, so that the battery cell module can release the high-temperature smoke in a directional manner in the event of thermal runaway, thereby improving the safety of the battery module and the system, and solving the problem of battery cells exploding from all directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an explosion of the semi-solid battery cell module of the present utility model.

[0016] Figure 2 It is a schematic diagram of the semi-solid battery cell module of the present invention.

[0017] Figure 3 A schematic diagram of a heat dissipation plate of the present invention.

[0018] Figure 4 It is a schematic diagram of the fixing bracket of the utility model.

[0019] Figure 5 It is a schematic diagram of a plurality of battery cell modules of the present invention after being stacked and a bus bar is installed on the fixing bracket.

[0020] Figure 6 It is a schematic diagram of the pressing plate of the utility model.

[0021] Figure 7 It is an exploded schematic diagram of the battery module of the utility model.

[0022] Reference numerals:

[0023] 10. Semi-solid battery cell module; 20. Side plate; 30. End plate; 40. Top plate; 50. Bottom plate; 60. Busbar; 70. FPC assembly;

[0024] 110, pressing plate; 120, fixing bracket; 130, heat sink; 140, battery cell; 150, thermal insulation pad;

[0025] 111, guide column; 112, first pressing portion; 113, battery cell stacking positioning column;

[0026] 121, hot melting point; 122, buckle; 123, first glue hole; 124, guide cylinder; 125, first pressing part; 126, second glue hole;

[0027] 131. Glue filling hole; 132. Directional explosion-proof hole; 133. Third glue hole; 134. Battery cell stacking positioning hole. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] like Figure 1 and Figure 2 As shown, a semi-solid battery cell module of an embodiment of the utility model includes a battery cell 140 and a heat sink 130 arranged on one side of the battery cell, the heat sink having an upper folding edge and a lower folding edge, which are formed by vertically bending the upper end and the lower end of the heat sink 130 in the same side direction, the upper folding edge and the lower folding edge surround the upper side surface and the lower side surface of the battery cell 140 on the outside, the left and right ends of the battery cell are fixed by a battery cell fixing frame, a directional explosion-discharging hole 132 is formed on the upper folding edge, and the lower folding edge is used for contacting and fixing with the bottom of the battery case.

[0030] In the above scheme, the directional explosion-discharging hole 132 can be Figure 2 The long strip holes or other shaped holes shown are not limited to Figure 2 In the embodiment shown, it can be multiple or one, and there is no specific limitation. The heat sink 130 is a metal plate, preferably an aluminum plate, and of course, other metal materials are also applicable.

[0031] In some embodiments, the battery cell fixing frame includes a fixing bracket 120 and a pressing plate 110. There are two fixing brackets 120, which are symmetrically arranged near both ends of the heat sink 130. There are two pressing plates 110, which cooperate with and are bonded to the fixing brackets 120 to press the battery cell 140 onto the heat sink 130 and fix it together with the heat sink 130.

[0032] In some embodiments, the fixing bracket 120 and the pressing plate 110 can be formed by injection molding and are plastic parts. Of course, other materials are also possible. The fixing bracket 120 and the pressing plate 110 are preferably fixed by gluing. After they are fixed, the battery cell and the heat sink can be pressed and fixed at the ends.

[0033] In some embodiments, in order to facilitate the assembly and alignment of the fixing bracket 120 and the pressing plate 110, a guide cylinder 124 is provided on the fixing bracket 120, see Figure 4 As shown, the pressure plate 110 is provided with a guide column 111 that cooperates with the guide cylinder 124. Figure 6 As shown, the number of the guide cylinder 124 and the guide column 111 is preferably two each, which are spaced apart in the radial direction relative to each other, so as to realize the assembly guidance of the fixed bracket 120 and the pressure plate 110, or other guiding or limiting structures can be used, but are not limited thereto.

[0034] In some embodiments, the fixing bracket 120 is provided with a first pressing portion 125, see Figure 4 As shown, the pressing plate 110 is provided with a second pressing portion 112 that cooperates with the first pressing portion 125, see Figure 6 As shown, the first clamping part 125 cooperates with the second clamping part 112 to clamp the aluminum-plastic film and the pole ear at the corresponding position of the battery cell. The first clamping part 125 and the second clamping part 112 are arranged in a corresponding manner, and the clamping surface between them can clamp the aluminum-plastic film and the pole ear at the corresponding position of the battery cell to assist in clamping and fixing the battery cell. The first clamping part 125 and the second clamping part 112 can be multiple, each of which is arranged spaced apart from each other, and their shape can be set as needed, and is not limited to the embodiment of the Y-shaped structure when viewed from above as shown in the figure.

[0035] In some embodiments, the tabs of the battery cell are welded to the busbar 60, and the busbar 60 is fixed by a buckle 122 provided on the fixing bracket 120, see Figure 5 As shown, the fixing bracket 120 has a buckle 122 for fixing the busbar 60 of the battery module. The buckle 122 is a pair, and a groove surface structure is formed between them to facilitate the installation of the busbar 60. The busbar 60 is fixed to the fixing bracket 120 by the buckle 122. The buckle 122 is preferably two, arranged with a spacing up and down, and its structure and shape can be set as needed, not limited to the situation shown in the figure, and any buckle 122 structure that is convenient for fixing the busbar 60 can be realized. The buckle 122 is preferably arranged on the outer side of the two ends of the fixing bracket 120 away from the battery cell.

[0036] The utility model arranges the buckle 122 on the fixing bracket 120, thereby eliminating the independent bus bracket and integrating the function of the bus bracket into the fixing bracket in the battery module, reducing materials, reducing the mold opening fee of the bus bracket and lowering costs.

[0037] In some embodiments, the fixing bracket 120 has a hot melting point 121 of the FPC (Flexible Printed Circuit Board) component 70, see Figure 4 As shown, the hot melt point 121 is used to fix the FPC assembly 70 by hot riveting. Preferably, the hot melt point 121 is arranged on the outer side away from the battery core 140 and above the buckle 122 set on the outer side of the fixing bracket 120.

[0038] In some embodiments, the fixed bracket 120 has a bracket edge that cooperates with the pressure plate 110, surrounds the first clamping part 125 and the guide cylinder 124 on the outside, and has foam 127 on the snap-fitting interface that cooperates with the pressure plate 110 to fill the gap that exists when the fixed bracket 120 and the pressure plate 110 are assembled to clamp the aluminum-plastic film edge of the battery cell. The pressure plate 110 also has a plate edge that surrounds the second clamping part 112 and the guide column 111 on the outside, and cooperates with the bracket edge to achieve a tight docking fit between the fixed bracket 120 and the pressure plate 110, and to clamp the packaging film edges at both ends of the battery cell, such as Figure 2 shown.

[0039] In some embodiments, the upper fold has a glue injection hole 131, which is arranged near the end of the heat sink 130, see Figure 2 As shown, the connecting surfaces of the fixing bracket 120 and the heat sink 130 are provided with glue holes, such as the first glue hole 123 and the second glue hole 126. After the fixing bracket 120 is installed at a predetermined position in the heat sink 130, the glue injected through the glue injection hole 131 fills the connecting surface of the fixing bracket 120 and the heat sink 130 through the glue hole, and the fixing bracket 120 and the heat sink 130 are fixed. By providing the glue injection hole 131 and the glue hole, the glue can be injected into the corresponding interval or space to fix the fixing bracket 120 to the heat sink 130 and the end face of the battery cell 140.

[0040] In some embodiments, the lower fold is formed with a third glue hole 133, see Figure 3As shown, when the battery module is fixed by glue pre-coated inside the battery box, the glue in the battery box enters to fix the edge seal at the lower end of the battery cell to the heat sink. Preferably, the third glue hole 133 is a rectangular hole, or a hole of other shapes. Through the arrangement of the third glue hole 133, when the battery module is assembled and fixed, the glue pre-coated inside the battery box enters through the glue hole to wrap and fix the aluminum-plastic film edge seal at the lower end of the battery cell on the outside, thereby achieving closure of the battery cell at the lower end, which is beneficial to explosion disposal when the battery cell is thermally runaway at the upper end.

[0041] In some embodiments, the side of the battery cell 140 away from the heat sink 130 is bonded with a heat insulating pad 150, and the heat insulating pad 150 can separate the individual battery cell modules from each other to prevent heat transfer. In some embodiments, the battery cell 140 and the heat sink 130 are glued and fixed, which can be done by spraying glue on the battery cell bonding surface of the heat sink 130 in advance, and then the battery cell is installed into the heat sink 130 and the two are glued and fixed.

[0042] In some embodiments, the pressing plate 120 has a battery cell stacking positioning column 113, such as Figure 2 As shown, the heat sink 130 has correspondingly matched battery cell stacking positioning holes 134, two of which are arranged spaced apart up and down, and they cooperate to facilitate the positioning, stacking and assembly of battery cell modules. The battery cell stacking positioning column 113 can be coaxially arranged with the guide column 111, with the same or different diameters.

[0043] The semi-solid battery cell module of the utility model is fixed by a battery cell fixing frame at the left and right ends of the battery cell, a directional explosion-removing hole is formed on the upper folded edge, and the lower folded edge is used for contacting and fixing with the bottom of the battery box body, so that the left and right ends and the lower end of the module are all fixed, and only the directional explosion-removing hole of the upper folded edge is retained, so that the directional explosion-removing of the battery cell in the event of thermal runaway can be achieved, so that the battery cell module can release the high-temperature smoke in a directional manner in the event of thermal runaway, thereby improving the safety of the battery module and the system, and solving the problem of battery cells exploding from all directions.

[0044] In a second aspect of the present invention, a battery module is provided. Figure 7 As shown, the semi-solid battery cell module of the first aspect of the utility model is included, wherein a plurality of the semi-solid battery cell modules 10 are stacked into a group to form a battery cell module stack, and a busbar 60 and an FPC assembly 70 are assembled on a fixed bracket 120 of the battery cell module stack formed after stacking, and the FPC assembly is fixed to the fixed bracket by hot riveting, and the busbar is fixed to the fixed bracket by snap-fitting. End plates 30 are provided on the front and rear sides of the battery module, and the top plate 40, the bottom plate 50 and the two side plates 20 are welded to the end plates 30 respectively, and the expansion of the battery cell module stack is restrained by welding on four sides.

[0045] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

[0046] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Semi-solid battery cell module, characterized in that: It includes a battery cell and a heat dissipation plate arranged on one side of the battery cell, the heat dissipation plate has an upper folding edge and a lower folding edge, the upper folding edge and the lower folding edge surround the upper side and the lower side of the battery cell on the outside, the left and right ends of the battery cell are fixed by a battery cell fixing frame, a directional explosion-discharging hole is formed on the upper folding edge, and the lower folding edge is used to contact and fix with the bottom of the battery box.

2. The semi-solid battery cell module according to claim 1, characterized in that: The battery cell fixing frame includes a fixing bracket and a pressing plate. There are two fixing brackets, which are symmetrically arranged near the two ends of the heat sink. There are two pressing plates, which cooperate with the fixing brackets and are bonded and fixed to press the battery cell tightly onto the heat sink.

3. The semi-solid battery cell module according to claim 2, characterized in that: The upper folded edge is provided with a glue injection hole, and the connecting surfaces of the fixing bracket and the heat sink are both provided with glue holes. After the fixing bracket is installed in the heat sink, the glue injected from the glue injection hole fills the connecting surface of the fixing bracket and the heat sink through the glue hole, thereby fixing the fixing bracket to the heat sink.

4. The semi-solid battery cell module according to claim 2, characterized in that: A guide cylinder is arranged on the fixing bracket, and a guide column matched with the guide cylinder is arranged on the pressing plate.

5. The semi-solid battery cell module according to claim 2, characterized in that: The fixing bracket is provided with a first pressing part, and the pressing plate is provided with a second pressing part cooperating with the first pressing part. The first pressing part cooperates with the second pressing part to clamp the aluminum-plastic film and the tab at the corresponding position of the battery cell.

6. The semi-solid battery cell module according to claim 2, characterized in that: The fixing bracket has buckles for fixing the busbars of the battery module and a hot melting point for the FPC assembly, and the hot melting point is used to fix the FPC assembly by hot riveting.

7. The semi-solid battery cell module according to claim 1, characterized in that: The lower folded edge is formed with glue holes, which are used for the glue in the battery box to enter and fix the sealed edge at the lower end of the battery cell to the heat sink when the battery module is fixed by glue pre-coated inside the battery box.

8. The semi-solid battery cell module according to claim 1, characterized in that: A heat insulation pad is bonded and arranged on the side of the battery core away from the heat sink, and the battery core is glued and fixed to the heat sink.

9. The semi-solid battery cell module according to claim 2, characterized in that: The pressing plate is provided with battery cell stacking positioning posts, and the heat dissipation plate is provided with corresponding battery cell stacking positioning holes, two of each, which are arranged spaced apart from each other up and down.

10. A battery module, characterized in that: Comprising the semi-solid battery cell module according to any one of claims 1 to 9.

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