Battery stack
By incorporating heat dissipation grooves and thermally conductive structural adhesive at both ends of the battery cells, the problem of uneven heat dissipation in the battery cell stack is solved, achieving uniform heat dissipation and space utilization efficiency of the battery cell assembly, and improving the practicality of the battery stack.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-03-20
AI Technical Summary
Existing energy storage battery cell stacks are prone to damage when heat dissipation is uneven, and existing heat dissipation structures occupy a lot of space, reduce energy density, and have poor practicality.
Embedded heat dissipation grooves are set at both ends of the individual battery cell, and thermally conductive structural adhesive and heat dissipation plates are embedded in the grooves. They are then fixed with cable ties to form a battery cell assembly. The busbar is welded to the terminal post to improve stability.
It achieves uniform heat dissipation within the cell pack, avoids damage to individual cells, saves space, does not reduce energy density, and improves the practicality of the battery stack.
Smart Images
Figure CN224020952U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of lithium ion battery especially relates to a battery stack. BACKGROUND
[0002] The battery module is the group battery that is composed of a plurality of single batteries and relevant installation structural members etc., and has a plurality of single battery cores with the battery module structure meeting the standards, and the number and size of the battery core are different in different battery modules.
[0003] In the prior art, the battery core stack of the energy storage battery is usually directly placed in the energy storage battery box, and then the air conditioner in the energy storage battery box is used for heat dissipation, but part of the single battery core cannot be uniformly cooled, and part of the single battery core in the battery core stack is prone to damage, thereby affecting the use of the whole battery core stack, and the existing battery core stack heat dissipation structure usually needs to occupy more use space, thereby reducing the energy density and poor practicability.
[0004] Therefore, the utility model provides a battery stack to solve the above problems. UTILITY MODEL CONTENTS
[0005] The utility model discloses a battery stack to solve the problems in the prior art.
[0006] In order to achieve the above object, the utility model adopts the following technical scheme:
[0007] A battery stack, comprising a battery core group, the battery core group is composed of a plurality of single battery cores, the single battery core is provided with an embedded heat dissipation groove at both ends, the heat dissipation groove is provided with a heat conduction structure adhesive, one side of the heat conduction structure adhesive is provided with a heat dissipation plate, and the heat dissipation plate is located in the heat dissipation groove.
[0008] Preferably, the size of the heat dissipation plate is consistent with the size of the heat dissipation groove, and the heat dissipation plate is fixed and bonded with the heat dissipation groove through the heat conduction structure adhesive.
[0009] Preferably, a binding belt is fixedly connected around the outside of the battery core group, and one side of the heat dissipation plate is in contact with the binding belt.
[0010] Preferably, the single battery core is provided with a pole on both sides of the top end, and the pole is provided with a busbar at the top end.
[0011] Preferably, the busbar is in the shape of a cuboid, and the busbar is fixedly connected with the pole through welding.
[0012] Preferably, the top end surface of the busbar is flush with the top end surface of the single battery core.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] In the scheme, the monomer battery cell in the battery cell group is provided with a heat dissipation plate at both ends, the monomer battery cell can be uniformly cooled, the monomer battery cell in the battery cell group is not easy to be damaged, thereby not easy to affect the use of the whole battery cell group, and the battery cell group cooling structure in the scheme does not need to occupy more use space, will not reduce the energy density, and the practicality is strong. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 An overall structure diagram of a battery stack is provided in the utility model.
[0016] Figure 2 An explosion structure diagram of a battery stack is provided in the utility model.
[0017] In the drawing: 1, battery cell group; 2, monomer battery cell; 3, binding belt; 4, busbar; 5, heat dissipation plate; 6, pole; 7, heat dissipation groove; 8, heat conduction structure glue. DETAILED DESCRIPTION
[0018] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.
[0019] Referring to Figure 1 and Figure 2 A battery stack includes a battery cell group 1, the battery cell group 1 is composed of a plurality of monomer battery cells 2, the monomer battery cell 2 is a hard shell battery cell, the size of the plurality of monomer battery cells 2 is consistent, and the plurality of monomer battery cells 2 are arranged in order in the horizontal direction to form the battery cell group 1.
[0020] The monomer battery cell 2 is provided with an embedded heat dissipation groove 7 at both ends, the heat dissipation groove 7 is formed by stamping or machining, the heat dissipation groove 7 is provided with heat conduction structure glue 8, the heat conduction structure glue 8 can play the role of bonding the heat dissipation plate 5 and conducting heat, one side of the heat conduction structure glue 8 is provided with the heat dissipation plate 5, the heat dissipation plate 5 is located in the heat dissipation groove 7, and the heat dissipation plate 5 can cool the monomer battery cell 2 on both sides of the monomer battery cell 2.
[0021] The monomer battery cell 2 in the battery cell group 11 is provided with a heat dissipation plate 5 at both ends, the monomer battery cell 2 can be uniformly cooled, the monomer battery cell 2 in the battery cell group 11 is not easy to be damaged, thereby not easy to affect the use of the whole battery cell group 11, and the battery cell group 11 cooling structure in the scheme does not need to occupy more use space, will not reduce the energy density, and the practicality is strong.
[0022] The size of the heat dissipation plate 5 is consistent with the size of the heat dissipation groove 7, the heat dissipation plate 5 is embedded in the heat dissipation groove 7, and the connection between the heat dissipation plate 5 and the heat dissipation groove 7 is gapless after connection, and the heat dissipation plate 5 and the heat dissipation groove 7 are flush with the side of the single battery cell 2 after connection, thereby effectively saving space utilization, the heat dissipation plate 5 is bonded and fixed with the heat dissipation groove 7 through the heat conduction structure glue 8, and the heat conduction structure glue 8 can play a role in bonding the heat dissipation plate 5 and conducting heat, thereby improving the heat dissipation performance of the heat dissipation plate 5.
[0023] The battery cell group 1 is fixedly connected with a binding belt 3 around the outside, one side of the heat dissipation plate 5 is in contact with the binding belt 3, and the plurality of single battery cells 2 are fixed through the binding belt 3, thereby forming the battery cell group 1, and the heat dissipation plate 5 is secondarily fixed through the binding belt 3, preventing the heat dissipation plate 5 from falling off due to the peeling of the heat conduction structure glue 8 caused by the long use time of the battery cell group 11, and improving the stability.
[0024] The single battery cell 2 is provided with a pole 6 at the top of both sides, and the pole 6 is embeddedly arranged, thereby reserving space for connecting the bus bar 4, the bus bar 4 is arranged at the top of the pole 6, the bus bar 4 is connected with the poles 6 of the plurality of single battery cells 2, and the plurality of single battery cells 2 are connected in series and parallel.
[0025] The bus bar 4 is in the shape of a cuboid, the cuboid has good stability, and the bus bar 4 is fixedly connected with the pole 6 through welding, thereby the bus bar 4 is not easy to be disconnected from the pole 6, and the stability is improved.
[0026] The top end surface of the bus bar 4 is flush with the top end surface of the single battery cell 2, thereby saving the space occupied by the bus bar 4, not needing to occupy more use space, effectively improving the energy density, and having high practicability.
Claims
1. A battery stack, comprising a cell assembly, wherein the cell assembly is composed of multiple individual cells, characterized in that, The individual battery cell has embedded heat dissipation grooves at both ends, and thermally conductive structural adhesive is provided in the heat dissipation grooves. A heat dissipation plate is provided on one side of the thermally conductive structural adhesive, and the heat dissipation plate is located in the heat dissipation groove.
2. The battery stack according to claim 1, characterized in that, The dimensions of the heat sink plate are the same as those of the heat dissipation groove, and the heat sink plate is bonded and fixed to the heat dissipation groove by the thermally conductive structural adhesive.
3. A battery stack according to claim 1, characterized in that, The battery cell assembly is fixedly connected to the outside of the battery cell assembly with a binding strap, and one side of the heat sink is in contact with the binding strap.
4. A battery stack according to claim 1, characterized in that, The individual battery cell has terminals on both sides at the top, and a busbar is provided at the top of the terminals.
5. A battery stack according to claim 4, characterized in that, The busbar is rectangular in shape and is fixedly connected to the pole by welding.
6. A battery stack according to claim 4, characterized in that, The top surface of the busbar is flush with the top surface of the individual battery cell.